Question

A car of mass 1000 kg moving with a velocity of 36 kmph hits a wall and comes to rest on 5s. Find the force exerted by the car on the wall?

Answer 1

HERE IS YOUR ANSWER :-

F = ma

= m(v-u) / t

Since m = 1000kg

u= 36km/h = 36*1000/60*60 = 10m/s

v = 0

t = 5s

=) F = 1000( 0-10) / 5

= 1000*-10/5

= - 2000 N

-ve sign indicates that force is in opposite direction of motion.

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