Question

A 100-kg man is ina car travelling at 20m/s.(a) Find his kinetic energy.(b)The car strikes a concrete wall and comes to rest after the front of car has collapsed 1m.The man is wearing a seat belt and harness.what is the average force exerted by the belt and harness during crash?​

Answer 1

Explanation:

Given = 100 kg man

              velocity = 20m/s

A)  K.E = 1/2 X Mass X $Velocity^{2}$

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

= 20000Kg m/$s^{2}$

B)  Force = Mass X Accelaration

  = 100 Kg X 400m/$s^{2}$

 = 40000 Newtons

Answer 2

Answer:

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