Question

Karen drops a 2.0 kg rock from the top of a mountain. Determine the distance the rock travels after falling for 3 seconds assuming it has repacked free fall and given the gradation always acceleration of 9.8 m/s^2 downward.

Answer 1

The motion of the rock is a free-fall motion, which is a uniformly accelerated motion with constant acceleration
`g=9.8 m/s^2` downward, so the distance covered by the rock in a time t can be found by using the formula

`S=(1)/(2) gt^2`

By substituting t=3 s into the formula, we find the distance the rock travels after falling for 3 seconds:

`S=(1)/(2) (9.8 m/s^2)(3 s)^2=44.1 m`