Vertical Forces & Acceleration Video Lessons

Concept

# Problem: A skydiver steps from a helicopter and falls for a few seconds until terminal velocity is reached. Thereafter, until he opens his parachute, his acceleration A) is constant.B) decreases.C) increases.D) is zero.E) none of the above

###### FREE Expert Solution

We are required to analyze motion with a friction force. The question refers to the period of terminal velocity and before opening a parachute.

We need to interpret the implication of terminal velocity.

Acceleration:

$\overline{){\mathbf{a}}{\mathbf{=}}\frac{\mathbf{∆}\mathbf{v}}{\mathbf{∆}\mathbf{t}}}$

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###### Problem Details

A skydiver steps from a helicopter and falls for a few seconds until terminal velocity is reached. Thereafter, until he opens his parachute, his acceleration

A) is constant.
B) decreases.
C) increases.
D) is zero.
E) none of the above