Question

An auto driver moving with the speed of 36km/hr sees a child in middle of road he applies brakes and bring his vechile to rest in 5 sec just in time to save the child if total mass of auto and driver is 450 kg then calculate the force of brakes​

Answer 1

Answer:

u = 36 km/h

v = 0 m/s

t = 5 s

Total mass of the system, M = 450 kg

▪Using the first law of motion, the acceleration (a) of the three-wheeler can be calculated as:

v = u + at

=> a= v- u / t = (0-36)/5= -7.2 m/s^2

◾The negative sign indicates that the velocity of the auto is decreasing with time.

◾Using Newton’s second law of motion, the net force acting on the auto can be calculated as:

F = Ma = 450 × (–7.2) = –3240 N

◾The negative sign indicates that the force is acting against the direction of motion of the auto.

I hope, this will help you___❤❤

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