Question

A ball is thrown straight up. For which situation are both the instantaneous velocity and the acceleration zero?

-on the way down
-none is correct
-at the top of the flight path
-on the way up

Answer 1

The correct option is b i.e none is correct.

The instantaneous velocity would be zero at the top but the acceleration would not be zero at that point. This is because the acceleration is the rate of change of velocity. since, the velocity is not constant, hence the acceleration would not be zero. The correct answer would be option b: None is correct.