If the values of instantaneous and average velocities are equal, the body is said to be moving with
Correct answer: D. Uniform velocity
- A. Uniform acceleration
- B. Uniform speed
- C. Variable velocity
- D. Uniform velocity
Explanation
The correct answer is Uniform velocity. When a body moves with uniform velocity, it means that both its speed and direction are constant over time. As a result, the instantaneous velocity at any point in time is equal to the average velocity over any time interval. Conversely, with Uniform acceleration, the velocity changes over time, so instantaneous and average velocities differ. Uniform speed only implies constant speed, not direction, so velocity can vary. Variable velocity explicitly means the velocity is changing, making the instantaneous and average velocities different.
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Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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