The velocity of a projectile is maximum:
Correct answer: C. Just before striking the ground and point of projection
- A. At half of the height
- B. At one-fourth of the height
- C. Just before striking the ground and point of projection
- D. None of the above
Explanation
The explanation is given below: The velocity of a projectile is maximum at two points in its trajectory: at the point of projection and just before striking the ground. At the point of projection, the initial velocity is entirely in the horizontal direction, so the horizontal component of velocity is maximum. Just before striking the ground, the projectile is moving vertically with the highest speed due to the acceleration by gravity. The horizontal component of velocity remains constant (ignoring air resistance), but the vertical component increases, reaching its maximum just before hitting the ground.
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About Force and Motion
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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