What is the Average Force Exerted on Occupants by Seatbelts in a Car Collision?

[dan1995420]

Homework Statement

A model of an 80 kg man and one of a 25 kg child in a 1000 kg car and secured with seatbelts. The car was moving at 75kph as it crashed into a break wall.If the collision took 0.2s, calculate the average force exerted on each model by its seat belt

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Homework Equations

f=ma

The Attempt at a Solution

im really confused, I am thinking that for the man: 80x20.8 (75000/3600), the divide by 0.2, so the force is 8333.3 Newtons?

Does the car's weight have anything to do with this?

 

[PhanthomJay]

Hi Dan, welcome to PF!

im really confused, I am thinking that for the man: 80x20.8 (75000/3600), the divide by 0.2, so the force is 8333.3 Newtons?

Yes

Does the car's weight have anything to do with this?

No.