Question

If you throw a rock straight up and there is no air drag, what is the acceleration of the rock on the way up? What is its acceleration on the way down? What is the velocity of the rock at the instant it reaches its highest point in its trajectory? What is the acceleration of the rock at its highest point?

Answer 1

Step-by-step explanation:

The rock will decelerate at the rate of g or 9.8 m s⁻²while on its way up because of gravitational attraction towards the earth. . In other words , it will accelerate with the magnitude - 9.8 m s⁻² while on its way up.

On its way down , it will accelerate due to gravitational attraction. In this case acceleration will be positive and equal to 9.8 m s⁻².

At the highest point in its trajectory , rock becomes stationary or comes to rest momentarily. So at the peak position , velocity is zero.

At the highest point , as the gravitational force continues to act on the body undiminished, its acceleration will remain the same ie 9.8 m s⁻² at the highest point as well. It will act in the downward direction.