In projectile motion, if air resistance is ignored, the horizontal motion is with
Correct answer: A. constant velocity
- A. constant velocity
- B. variable velocity
- C. constant acceleration
- D. constant retardation
Explanation
When air resistance is ignored, the only force acting on the projectile horizontally is its initial velocity. As there are no horizontal forces acting on it, the horizontal velocity remains constant throughout the motion.Incorrect Options Explanation:(b) variable velocity: There are no external horizontal forces acting on the projectile, so its horizontal velocity remains constant.(c) constant acceleration: There is no external force causing acceleration in the horizontal direction.
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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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