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Questions and Answers
Speed is the ______ covered by a body in a particular time
displacement
Velocity = ______
displacement/time
Acceleration is the rate of change of ______ with respect to time
velocity
The unit of velocity is ______
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The unit of acceleration is ______
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Study Notes
Kinematics and Newtonian Mechanics
Speed, Velocity, and Acceleration
- Speed is the distance covered by a body in a particular time, measured in m/s, and is a scalar quantity.
- Velocity is a measure of an object's speed in a specific direction.
- Average speed is calculated by distance travelled/time taken.
- Uniform acceleration is when an object's velocity changes at a constant rate, calculated by change in velocity/time taken.
- Non-uniform acceleration is when an object's velocity changes at a varying rate.
- Deceleration is a negative acceleration.
Graphical Analysis of Motion
- Speed-time and distance-time graphs can be plotted and interpreted to describe an object's motion.
- The shape of a speed-time graph can indicate:
- At rest: horizontal line
- Moving with uniform speed: horizontal line
- Moving with uniform acceleration: curved line
- Moving with non-uniform acceleration: irregular line
- The area under a speed-time graph can be calculated to determine the distance travelled 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.
- The motion of bodies with constant weight falling with and without air resistance can be described qualitatively.
- Terminal velocity is the maximum velocity reached by a falling object when air resistance equals the weight of the object.
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Description
Test your understanding of speed, velocity, acceleration, and graphical analysis of motion in this quiz based on the learning outcomes from Edition One Physics with Sir A.J. Prepare for questions related to free-fall, uniform and non-uniform acceleration.
