Podcast
Questions and Answers
What is the formula for speed?
What is the formula for speed?
What is the unit of velocity?
What is the unit of velocity?
What does acceleration denote?
What does acceleration denote?
What is the formula for average speed?
What is the formula for average speed?
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What is displacement?
What is displacement?
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Study Notes
Kinematics Learning Outcomes
- Speed is the distance covered by a body in a particular time, measured in meters per second (m/s), and is a scalar quantity.
Speed, Velocity, and Acceleration
- Speed is different from velocity, with velocity being a vector quantity.
- Average speed is calculated by dividing distance traveled by time taken.
- Uniform acceleration occurs when the velocity of an object changes at a constant rate.
- Acceleration is calculated by dividing the change in velocity by time taken.
- Deceleration is a negative acceleration.
Graphical Analysis of Motion
- Speed-time graphs and distance-time graphs can be plotted and interpreted to understand motion.
- The shape of a speed-time graph can indicate:
- A body at rest (horizontal line)
- A body moving with uniform speed (flat, non-zero line)
- A body moving with uniform acceleration (curved line)
- A body moving with non-uniform acceleration (irregular curve)
- The area under a speed-time graph can be calculated to determine the distance traveled for motion with uniform speed or uniform acceleration.
Free-Fall
- The acceleration of free-fall for a body near the Earth is constant and approximately 9.8 m/s².
- Bodies with constant weight falling with and without air resistance experience:
- Free-fall without air resistance: acceleration at 9.8 m/s²
- Free-fall with air resistance: terminal velocity is reached, and acceleration decreases.
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Description
Test your understanding of speed, velocity, acceleration, and graphical analysis of motion in this quiz. Explore concepts such as free-fall and uniform/non-uniform acceleration, and recall and apply relevant formulas. Get ready to improve your knowledge of physics with Sir A.J!