# MOMENTUM AND FORCE

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• Created by: LAUREN.F
• Created on: 17-05-16 10:29
What is the momentum of a 1000kg car travelling at 30m/s?
P = M x V P = 1000 x 30 = 30 000kg m/s
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A car mass 800kg moving at 10m/s collides with a wall in an impact that lasts 0.1s. Calculate the force of the impact.
Mass x velocity / time = 800 x 10 / 0.1 = 80 000N
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Why do cars have crumple zones at both the front and the rear?
The crumple zones at the front and rear increase the impact time and therefore reduce the impact force in crash.
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Calculating momentum P = M x V
Momentum = mass x velocity e.g. M = 50kg x 10m/s = 500kg m/s
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Velocity after impact.
Velocity after impact = mass x velocity / both weights added
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Calculating the force of an impact.
Mass x velocity / time
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Recoil velocity.
Mass x velocity / weight of object = -answer
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## Other cards in this set

### Card 2

#### Front

A car mass 800kg moving at 10m/s collides with a wall in an impact that lasts 0.1s. Calculate the force of the impact.

#### Back

Mass x velocity / time = 800 x 10 / 0.1 = 80 000N

### Card 3

#### Front

Why do cars have crumple zones at both the front and the rear?

### Card 4

#### Front

Calculating momentum P = M x V

### Card 5

#### Front

Velocity after impact.