A rock falls off a cliff and hits the ground after three seconds. The rock's velocity is 29.4 m/s when it hits the ground.
What is its acceleration of the rock in the downward direction?
Responses
0.31 ms2
0.31 m per s squared,
3 ms2
3 m per s squared,
9.8 ms2
9.8 m per s squared,
88.2 ms2
1 answer
The correct answer is 9.8 m per s squared. The acceleration of an object in free fall near the surface of the Earth, in the downward direction, is approximately 9.8 m per s squared.