What is the velocity of a projectile at the highest point?
Correct answer: D. vx= constant, vy=0
- A. vx= 0, vy=0
- B. vx= 0, vy constant
- C. vx= constant, vy= constant
- D. vx= constant, vy=0
Explanation
Vx/ horizontal component of velocity is always constant in absence of air resistance, as in absence of air friction we consider ax=0 and no other force acts in that direction. (FACT) While, for the Vy/ vertical component of velocity at highest point of projectile motion is zero because ay=g, the object experiences constant acceleration due to gravity. Hence, it has zero velocity.
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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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