Forces Exerted by Seatbelt?

  • Thread starter dan1995420
  • Start date
  • #1

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

.

Homework Equations


f=ma


The Attempt at a Solution


im really confused, im 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?
 

Answers and Replies

  • #2
PhanthomJay
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Hi Dan, welcome to PF!

:biggrin:
im really confused, im 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.
 

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