Question

quiz
multiple choice 1 point
rock a is thrown horizontally off a cliff with a velocity of 20 m/s. the rock lands 60 m from the base of the cliff.
according to the information and diagram shown above, what is the magnitude of the vertical acceleration for rock a after it is released?
0 m/s²
9.8 m/s²
3 m/s²
20 m/s²
multiple choice 1 point

Explanation:

Step1: Identify the motion type

The rock is in free - fall motion after release.

Step2: Recall acceleration in free - fall

Near the surface of the Earth, the vertical acceleration of an object in free - fall is the acceleration due to gravity, which is approximately $9.8\ m/s^{2}$.

Answer:

$9.8\ m/s^{2}$