a motor car is moving with a velocity of 108km/h and it takes 4s to stop after brakes applied .calculate the force exerted by the brakes on the motorcycle if its mass along with passengers is 1000kg
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We are given that Initial velocity of motor car = 108 km/h ⇒ (u) = 108 × 1000 60 × 60 108×100060×60 = 30 m/s Final velocity (v) = 0 m/s Total mass of the motor car along with its passengers (m) = 1000 kg. Time is taken to stop the motor car (t) = 4 sec. The negative sign shows that the force exerted by the brakes is opposite to the direction of motion of the motor car.
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