Question

the car strikes a concrete wall and comes to rest after the front of the car has collapsed 1m the man is wearing seat belt and harness what is is the average force exerted by the belt and harness during the crash
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Answer 1

Answer:

Given = 100 kg man

velocity = 20m/s

A) K.E = 1/2 X Mass X Velocity^{2}Velocity

2

= 1/2 X 100Kg X 400m/s^{2}s

2

= 20000Kg m/s^{2}s

2

B) Force = Mass X Accelaration

= 100 Kg X 400m/s^{2}s

2

= 40000 Newtons