Question

In the projectile motion of a particle on a level ground, which of the following remains constant with reference to time and position?

• A. Angle between the instantaneous velocity with the horizontal
• B. Vertical component of the velocity of the projectile
• C. Average velocity between any two points on the path
• D. Horizontal component of velocity

Hint:

In projectile motion, remember that only the horizontal component of velocity remains constant, while the vertical component changes under the influence of gravity.

Answer 1

The Correct Option is D

In projectile motion, the horizontal component of velocity is constant because there is no acceleration in the horizontal direction (assuming no air resistance). The vertical component of velocity changes due to the acceleration due to gravity. Similarly, the angle between the velocity and the horizontal changes throughout the motion. The average velocity between any two points also changes, as the trajectory is parabolic. Therefore, the only quantity that remains constant is the horizontal component of velocity.