Question

While waiting in a car at stoplight, and 80 kg man and his car a re suddenly accelerated to a speed of 5 \mathrm{ms}^{-1}5ms −1 as a result or rear end collision. If the time of impact is 0.4 \mathrm{s}0.4s, the average force on

Answer 1

Answer:

1000N

Explanation:

Momentum=p= mass x velocity

p= 80kg x 5 m/s

p= 400kgm/s

Force= rate of change in momentum

F=p/t

F= 400/0.4= 1000N

Answer 2

Answer:

1000N

Explanation:

GIVEN- While waiting in a car at stoplight, and 80 kg man and his car a re suddenly accelerated to a speed of 5 \mathrm{ms}^{-1}5ms −1 as a result or rear end collision. If the time of impact is 0.4 \mathrm{s}0.4s,

TO FIND- the average force

SOLUTION-

momentum= p= mass × velocity

p= 80kg× 5m/s

p= 400kgm/s

f= p/t

F= 400/0.4

= 1000N

FINAL ANSWER- 1000N

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