16-05-2016
Physics

Answered

A 4,000-kg car traveling at 20m/s hits a wall with a force of 80,000 N and comes to a stop. What was the impact time?

Verified Answer :

akshayrao091 akshayrao091

26-05-2016

Rate of change of momentum = impact force
(mv-mu)/t = F
4000*20/t = 80000 (note: v is zero as it stopped)
soo, t = 1 sec

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