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Questions and Answers
What is the formula for speed?
What is the unit of velocity?
What does acceleration denote?
What is the formula for average speed?
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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!