Podcast
Questions and Answers
A car travels 10 km east, then 5 km west. What is the total distance travelled by the car?
A car travels 10 km east, then 5 km west. What is the total distance travelled by the car?
- 15 km (correct)
- 20 km
- 10 km
- 5 km
A car travels 10 km east, then 5 km west. What is the displacement of the car?
A car travels 10 km east, then 5 km west. What is the displacement of the car?
- 5 km east (correct)
- 5 km west
- 15 km east
- 15 km west
A ball is thrown vertically upwards and then returns to the thrower's hand. Which of the following statements is true about the ball's motion?
A ball is thrown vertically upwards and then returns to the thrower's hand. Which of the following statements is true about the ball's motion?
- The total displacement of the ball is zero. (correct)
- The total distance travelled by the ball is zero.
- The ball's displacement is the same as the distance travelled.
- The ball's velocity is constant throughout the motion.
Which of the following is a vector quantity?
Which of the following is a vector quantity?
A student walks 5 meters north, then 3 meters south. What is the student's displacement?
A student walks 5 meters north, then 3 meters south. What is the student's displacement?
A car travels 10 km east, then 5 km west, and finally 2 km east. What is the car's total displacement?
A car travels 10 km east, then 5 km west, and finally 2 km east. What is the car's total displacement?
A ball is thrown vertically upwards and reaches a maximum height of 5 meters. What is the ball's displacement when it returns to the point where it was thrown?
A ball is thrown vertically upwards and reaches a maximum height of 5 meters. What is the ball's displacement when it returns to the point where it was thrown?
A car travels 10 km east, then 5 km west, and finally 3 km south. What is the total distance traveled by the car?
A car travels 10 km east, then 5 km west, and finally 3 km south. What is the total distance traveled by the car?
A car travels 10 km east, then 5 km west, and finally 3 km south. What is the car's displacement?
A car travels 10 km east, then 5 km west, and finally 3 km south. What is the car's displacement?
A runner completes a 400-meter track race in 50 seconds. What is the runner's average speed?
A runner completes a 400-meter track race in 50 seconds. What is the runner's average speed?
An object moves 10 meters east, then 5 meters west, then 3 meters south. What is the object's average velocity?
An object moves 10 meters east, then 5 meters west, then 3 meters south. What is the object's average velocity?
A car travels at a constant speed of 60 km/h for 2 hours. What is the total distance traveled by the car?
A car travels at a constant speed of 60 km/h for 2 hours. What is the total distance traveled by the car?
Which of the following statements best describes the relationship between speed and velocity?
Which of the following statements best describes the relationship between speed and velocity?
An object is moving at a constant velocity. Which statement is TRUE about its acceleration?
An object is moving at a constant velocity. Which statement is TRUE about its acceleration?
In a displacement-time graph, what does the gradient of the line represent?
In a displacement-time graph, what does the gradient of the line represent?
What does the area under a velocity-time graph represent?
What does the area under a velocity-time graph represent?
If a car is traveling at a constant velocity, what would the shape of its velocity-time graph look like?
If a car is traveling at a constant velocity, what would the shape of its velocity-time graph look like?
If a car is accelerating at a constant rate, what would the shape of its velocity-time graph look like?
If a car is accelerating at a constant rate, what would the shape of its velocity-time graph look like?
If a car is decelerating, what would the shape of its velocity-time graph look like?
If a car is decelerating, what would the shape of its velocity-time graph look like?
If a car is at rest, what is its velocity?
If a car is at rest, what is its velocity?
What does the gradient of a velocity-time graph represent?
What does the gradient of a velocity-time graph represent?
If a car is moving with constant acceleration, what would the shape of its acceleration-time graph look like?
If a car is moving with constant acceleration, what would the shape of its acceleration-time graph look like?
What is the acceleration of the car between 4 s and 18 s?
What is the acceleration of the car between 4 s and 18 s?
The acceleration due to gravity is approximately 10 m/s². What is the direction of this acceleration?
The acceleration due to gravity is approximately 10 m/s². What is the direction of this acceleration?
Which of the following statements is TRUE about objects in free fall?
Which of the following statements is TRUE about objects in free fall?
What is the equation for calculating the final velocity (v) of an object undergoing uniformly accelerated motion?
What is the equation for calculating the final velocity (v) of an object undergoing uniformly accelerated motion?
A car is traveling at a constant velocity. What can be concluded about the acceleration of the car?
A car is traveling at a constant velocity. What can be concluded about the acceleration of the car?
What is the acceleration of the car during the last two seconds of its journey (on section BC)?
What is the acceleration of the car during the last two seconds of its journey (on section BC)?
What is the acceleration of the car for the first 4 seconds of its journey (on section OA)?
What is the acceleration of the car for the first 4 seconds of its journey (on section OA)?
What is the total distance travelled by the car in the first 4 seconds of its journey?
What is the total distance travelled by the car in the first 4 seconds of its journey?
A car accelerates uniformly from rest. Which of the following statements is TRUE?
A car accelerates uniformly from rest. Which of the following statements is TRUE?
A ball is thrown vertically upwards. At the highest point of its motion, what is the ball's velocity?
A ball is thrown vertically upwards. At the highest point of its motion, what is the ball's velocity?
A car is traveling at a constant velocity of 20 m/s. If the car suddenly accelerates at a rate of 5 m/s² for 4 seconds, what is the final velocity of the car?
A car is traveling at a constant velocity of 20 m/s. If the car suddenly accelerates at a rate of 5 m/s² for 4 seconds, what is the final velocity of the car?
A stone is thrown vertically upwards with an initial velocity of 15 m/s. What is the stone's velocity after 2 seconds?
A stone is thrown vertically upwards with an initial velocity of 15 m/s. What is the stone's velocity after 2 seconds?
An object is dropped from rest and falls freely under the influence of gravity. What is the object's acceleration?
An object is dropped from rest and falls freely under the influence of gravity. What is the object's acceleration?
A rocket is launched vertically upwards. What is the rocket's acceleration at the moment it reaches its maximum height?
A rocket is launched vertically upwards. What is the rocket's acceleration at the moment it reaches its maximum height?
If a car is traveling at a constant velocity, what does this mean about its acceleration?
If a car is traveling at a constant velocity, what does this mean about its acceleration?
Two identical balls are thrown vertically upwards, one with an initial velocity of 5 m/s and the other with an initial velocity of 10 m/s. Which ball takes longer to reach its maximum height?
Two identical balls are thrown vertically upwards, one with an initial velocity of 5 m/s and the other with an initial velocity of 10 m/s. Which ball takes longer to reach its maximum height?
A ticker-tape timer makes 60 dots per second. If a tape shows 8 intervals, what is the time taken?
A ticker-tape timer makes 60 dots per second. If a tape shows 8 intervals, what is the time taken?
In a ticker-tape timer, if the dots are spaced far apart, what does it indicate about the object's motion?
In a ticker-tape timer, if the dots are spaced far apart, what does it indicate about the object's motion?
A ticker tape timer produces dots at a rate of 50 Hz. If a section of the tape shows 15 intervals, how far did the object travel if the length of the tape is 9 cm?
A ticker tape timer produces dots at a rate of 50 Hz. If a section of the tape shows 15 intervals, how far did the object travel if the length of the tape is 9 cm?
What is the frequency of a ticker-tape timer if it produces 10 dots in 0.5 seconds?
What is the frequency of a ticker-tape timer if it produces 10 dots in 0.5 seconds?
A ticker-tape timer is used to analyse the motion of a toy car. The dots on the tape are evenly spaced. What can you conclude about the car's motion?
A ticker-tape timer is used to analyse the motion of a toy car. The dots on the tape are evenly spaced. What can you conclude about the car's motion?
A ticker-tape timer is used to record the motion of an object. The frequency of the timer is 40 Hz. The tape shows 5 intervals between two dots. What is the time taken for the object to travel between these dots?
A ticker-tape timer is used to record the motion of an object. The frequency of the timer is 40 Hz. The tape shows 5 intervals between two dots. What is the time taken for the object to travel between these dots?
A ticker tape timer makes 100 dots per second. A student measures a section of tape with 6 intervals. What is the distance travelled in this section of tape if the speed of the object is 2 m/s?
A ticker tape timer makes 100 dots per second. A student measures a section of tape with 6 intervals. What is the distance travelled in this section of tape if the speed of the object is 2 m/s?
A ticker-tape timer is set to record the motion of a toy train. The train is initially at rest, then accelerates, and finally moves at a constant speed. Which of the following accurately describes the appearance of the dots on the tape?
A ticker-tape timer is set to record the motion of a toy train. The train is initially at rest, then accelerates, and finally moves at a constant speed. Which of the following accurately describes the appearance of the dots on the tape?
Flashcards
Vector Quantity
Vector Quantity
A physical quantity with both magnitude and direction.
Distance
Distance
Total length covered by a moving object, regardless of direction.
Displacement
Displacement
Straight line distance in a specified direction from the starting point.
Direction of Vector
Direction of Vector
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Scalar Quantity
Scalar Quantity
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Examples of Vector Quantities
Examples of Vector Quantities
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Sign Convention
Sign Convention
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Total Distance vs. Displacement
Total Distance vs. Displacement
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Displacement at highest point
Displacement at highest point
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Displacement at lowest point
Displacement at lowest point
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Speed vs Velocity
Speed vs Velocity
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Average Speed
Average Speed
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Instantaneous Speed
Instantaneous Speed
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Rate of Change of Distance
Rate of Change of Distance
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Rate of Change of Displacement
Rate of Change of Displacement
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Graphical Representation of Speed
Graphical Representation of Speed
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Constant acceleration
Constant acceleration
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Acceleration of free fall
Acceleration of free fall
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Gravitational force
Gravitational force
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Free fall
Free fall
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Equations of motion
Equations of motion
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Uniformly accelerated motion
Uniformly accelerated motion
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Initial velocity (u)
Initial velocity (u)
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Final velocity (v)
Final velocity (v)
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Positive Gradient
Positive Gradient
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Velocity-Time Graph
Velocity-Time Graph
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Gradient of Displacement-Time Graph
Gradient of Displacement-Time Graph
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Area under Velocity-Time Graph
Area under Velocity-Time Graph
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Acceleration-Time Graph
Acceleration-Time Graph
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Change in Velocity
Change in Velocity
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Non-Uniform Acceleration
Non-Uniform Acceleration
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Ticker-Tape Timer
Ticker-Tape Timer
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Measuring Speed
Measuring Speed
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Distance Measurement
Distance Measurement
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Time Measurement
Time Measurement
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Frequency in Ticker-Tape
Frequency in Ticker-Tape
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Interval Time Calculation
Interval Time Calculation
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Speed Calculation Example
Speed Calculation Example
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Dot Spacing Interpretation
Dot Spacing Interpretation
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Acceleration
Acceleration
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Gradient of v-t graph
Gradient of v-t graph
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First equation of motion
First equation of motion
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Second equation of motion
Second equation of motion
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Third equation of motion
Third equation of motion
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Vertical motion
Vertical motion
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Study Notes
Kinematics
- Content: Speed, Velocity, Acceleration, Graphical Analysis of Motion, Acceleration of Free-Fall
- Learning Outcomes: Students should be able to define and calculate speed and velocity, calculate average speed, define and calculate uniform acceleration, interpret displacement-time and velocity-time graphs, calculate displacement traveled for uniform velocity or uniform acceleration, and identify the acceleration of free-fall near Earth.
- References: Chew, C., et al. (2023). GCE 'O' Level Physics Matters (5th ed). Marshall Cavendish Education.
- Notes Outline: Scalars and Vectors, Distance and Displacement, Speed and Velocity, Calculating Speed (using ticker-tape timer), Acceleration, Graphs of Motion, and Acceleration of Free Fall.
- Scalars and Vectors: Physical quantities with magnitude only (scalars) and physical quantities with magnitude and direction (vectors). Examples of scalars include time, length, mass, energy, and examples of vectors include displacement, velocity, acceleration, and force.
- Distance and Displacement: Distance is the total length covered by an object, while displacement is the straight-line distance between the initial and final positions of an object.
- Speed and Velocity: Speed is the rate of change of distance, and velocity is the rate of change of displacement. Both are measured in meters per second (m/s), but velocity is a vector quantity meaning it has direction.
- Calculating Speed: The ticker-timer is a device used with a moving object to determine speed. The dots along the tape represent regular intervals of time. The distance traveled by the object is measured and is divided by the time.
- Acceleration: Is the rate of change of velocity. Calculated by (change in velocity over time taken). It has magnitude and direction and is measured in m/s². There is acceleration if there is a change in speed, direction, or both.
- Graphs of Motion: Displacement-time graphs show the change in position over time. Velocity-time graphs show the change in velocity over time. Acceleration-time graphs show the change in acceleration over time. Information about motion, acceleration, speed, etc, can be determined from gradients and areas under the curves in these graphs.
- Acceleration of Free Fall: The acceleration of an object due to gravity near Earth is constant and approximately 10 m/s².
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