Question

You are throwing a stone straight-up in the absence of air friction. The stone is caught at the same height from which it was thrown. Determine the validity of the following statements
the acceleration is constant
the acceleration is "up" while it is still moving up, and "down" when it is on the way down.
the acceleration is maximum at the top point of the motion

Answer 1

Answer:

the acceleration is constant

Explanation:

When stone is moving in the air then it has force of gravity on it

Since there is no other force like air friction is to be neglected

so we know that

$F_{net} = mg$

so we will have

$a = \frac{F_{net}}{m}$

$a = \frac{mg}{m}$

$a = g$

so the acceleration of the stone is always constant and directed vertically downwards with constant magnitude