A bullet train is moving with velocity 180km/h and it takes 5 seconds to stop after brakes applied find the force exerted by brakes on the wheel if mass is 2000 kg.
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180km/h =180X5/18 m/s =50m/s
therefore, a = 0-50/5
= -10m/s^2
now ,
F = 2000 X 10
= 20000 N. answer
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