Vertical Motion and Free Fall Video Lessons

Concept

# Problem: An object at rest near the surface of a distant planet starts to fall freely. If the acceleration there is twice that of the Earth, its speed one second later would be A) 10 m/s. B) 20 m/s. C) 30m/s. D) 40m/s.

###### FREE Expert Solution

Using the kinematic equation:

$\overline{){{\mathbf{v}}}_{{\mathbf{f}}}{\mathbf{=}}{{\mathbf{v}}}_{{\mathbf{0}}}{\mathbf{+}}{\mathbf{a}}{\mathbf{t}}}$

###### Problem Details

An object at rest near the surface of a distant planet starts to fall freely. If the acceleration there is twice that of the Earth, its speed one second later would be

A) 10 m/s.

B) 20 m/s.

C) 30m/s.

D) 40m/s.