# Momentum and Energy

• Created by: Steph.S
• Created on: 01-03-17 13:53
What is the Momentum Equation?
p=mv, where p is momentum, m is mass and v is velocity
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Is linear momentum conserved?
Yes
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State Newtons 2nd Law
The force on an object is equal to rate of change of momentum
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What is impulse?
The average force applied to an object x the time over which the force acts
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Impulse Equation?
fΔt=Δ(mv), where f is constant
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What does the area under a force time graph represent?
The impulse,
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How does force vary with time?
An increase in time, results in a decrease in force.
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What is the difference between elastic and inelastic collisions?
Momentum is conserved in both, but kinetic energy is only conserved in elastic collisions
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How are safety features designed with momentum conservation in mind?
Crumple zones in cars are designed to increase the time of the collision, thus reducing the force, as are almost all safety features are
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## Other cards in this set

### Card 2

#### Front

Is linear momentum conserved?

Yes

### Card 3

#### Front

State Newtons 2nd Law

What is impulse?

### Card 5

#### Front

Impulse Equation?