Sagot :
Answer:
1.At the highest point, the velocity of the ball becomes zero, after which it starts to fall down. At this point, the velocity of the ball is zero yet its acceleration is equal to g=9.8m/s2.
2.It means that velocity is constant. Acceleration is the rate of change of velocity; if it is zero, velocity is not changing.
Answer:
An object with zero velocity has zero acceleration only if it maintains its zero velocity (or state of rest) for some time interval. Otherwise, it has acceleration.
2.velocity is not changing.