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Relative Position

A person driv...

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A person driving a car with a speed 72 km per hour suddenly sees a boy crossing the road. If the distance moved by car before the person applies brakes is 5 m the reaction time of person is

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Q. A person driving a car at a speed 72 km per hour, sees a boy crossing the road. If the distance moved by the car before the person applies brakes is 5 m, find the reaction time of the person.

Q. A person driving a car with a speed 72 km/h, suddenly sees a boy crossing by car before the person applies brakes is 5 m, the reaction time of the person will be

Q. A Driver is driving a car at speed of 72 km/hr on road. He sees a boy on road at a distance of 48 m from him. If his reaction time is 0.4 sec, find minimum retardation required to save the boy.

Q. A car is moving at a speed of

72 k m / h r

on a road having

2 %

upward gradient. The driver applies brakes when he sees an obstruction. If his reaction time is

1.5 seconds

, assuming that the coefficient of friction between the pavement and tyre as

0.15

, calculate the distance traversed before the car finally stops

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