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Questions and Answers
Which of the following statements correctly differentiates speed from velocity?
Which of the following statements correctly differentiates speed from velocity?
Velocity is represented solely by a number without any directional information.
Velocity is represented solely by a number without any directional information.
False
What can be determined from the gradient of a distance-time graph?
What can be determined from the gradient of a distance-time graph?
Speed
A distance-time graph with a flat section indicates that the object is _____
A distance-time graph with a flat section indicates that the object is _____
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Match the following velocity definitions to their correct types:
Match the following velocity definitions to their correct types:
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In a distance-time graph, which of the following indicates that an object is decelerating?
In a distance-time graph, which of the following indicates that an object is decelerating?
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A downhill slope on a distance-time graph indicates that the object is moving backward.
A downhill slope on a distance-time graph indicates that the object is moving backward.
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What does a steeper graph indicate compared to a less steep graph in terms of speed?
What does a steeper graph indicate compared to a less steep graph in terms of speed?
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What is the resultant force acting on the object if 9000 N is acting to the right and 1000 N is acting to the left?
What is the resultant force acting on the object if 9000 N is acting to the right and 1000 N is acting to the left?
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According to Newton's 3rd Law, if object A exerts a force on object B, then object B does not exert a force back on object A.
According to Newton's 3rd Law, if object A exerts a force on object B, then object B does not exert a force back on object A.
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What is the mass of the car involved in the force scenario?
What is the mass of the car involved in the force scenario?
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In the equation $F = ma$, the letter 'a' represents _______.
In the equation $F = ma$, the letter 'a' represents _______.
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Match the following characteristics of living things with their meaning:
Match the following characteristics of living things with their meaning:
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Which of the following best describes the process of a rocket functioning according to Newton's 3rd Law?
Which of the following best describes the process of a rocket functioning according to Newton's 3rd Law?
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Which type of force acts downwards and is always present on objects near the Earth's surface?
Which type of force acts downwards and is always present on objects near the Earth's surface?
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Sensitivity refers to the ability of living things to remain unaffected by environmental changes.
Sensitivity refers to the ability of living things to remain unaffected by environmental changes.
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The total mass of the car and the applied forces can help us determine the ______ of the car.
The total mass of the car and the applied forces can help us determine the ______ of the car.
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Friction is a force that always helps to speed up an object.
Friction is a force that always helps to speed up an object.
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What is the result of the forces acting on an object if the upward thrust is greater than the downward weight?
What is the result of the forces acting on an object if the upward thrust is greater than the downward weight?
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Normal force is also known as __________ force.
Normal force is also known as __________ force.
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Match the definitions to the corresponding types of forces:
Match the definitions to the corresponding types of forces:
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What equation represents distance travelled using acceleration and time?
What equation represents distance travelled using acceleration and time?
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Electrostatic forces only act on charged objects.
Electrostatic forces only act on charged objects.
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What does a free body diagram represent?
What does a free body diagram represent?
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The force that opposes the motion between two surfaces is called __________.
The force that opposes the motion between two surfaces is called __________.
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Which of the following forces acts upwards from water?
Which of the following forces acts upwards from water?
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Study Notes
Speed and Velocity
- Speed and velocity are both measured in m/s
- Speed only describes how fast something is moving (magnitude)
- Velocity describes how fast something is moving and in what direction (magnitude and direction)
- Example: 30m/s East
Distance-Time Graphs
- Gradient of a distance-time graph represents speed
- Flat sections on a graph indicate the object is stopped
- Steeper lines on a graph represent faster speeds
- Downward slopes indicate deceleration
- Curves show acceleration/deceleration
- Steepening curves = acceleration
- Leveling off curves = deceleration
Calculating Speed
- Calculating speed involves finding the gradient of the distance-time graph
- Speed = vertical distance / horizontal time
Acceleration
- Acceleration is measured in m/s²
- Acceleration is the rate of change in velocity
- Acceleration = change in velocity / time taken
Important Note
- Gradient is the slope of the line
- In distance/time graph: Gradient = Speed
- If the line is flat on the distance/time graph: Object stopped
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