Intro to Momentum Video Lessons

Concept

# Problem: 1. When bullets are fired from an airplane in the forward direction, the momentum of the airplane will beA) decreased.B) unchanged.C) increased.2. A clerk can lift containers a vertical distance of 1 meter or can roll them up a 2 meter-long ramp to the same elevation. With the ramp, the applied force required is aboutA) half as much.B) twice as much.C) the same.D) four times as much.

###### FREE Expert Solution

1.

Momentum:

$\overline{){\mathbf{p}}{\mathbf{=}}{\mathbf{m}}{\mathbf{v}}}$

We'll handle this problem without much calculation.

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###### Problem Details

1. When bullets are fired from an airplane in the forward direction, the momentum of the airplane will be
A) decreased.
B) unchanged.
C) increased.

2. A clerk can lift containers a vertical distance of 1 meter or can roll them up a 2 meter-long ramp to the same elevation. With the ramp, the applied force required is about
A) half as much.
B) twice as much.
C) the same.
D) four times as much.