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A body covers 200 cm in the first 2 seconds and 220 cm in the next 4 seconds. The velocity of the body at the end of the 7th second is

The displacement-time graphs of two moving particles make angles of 30° and 45° with the x-axis as shown in the figure. The ratio of their respective velocity is :

The velocity time graph of a body moving in a straight line is shown in the figure. The displacement and distance traveled by the body in 8 s are

A body is being moved along a straight line by a machine delivering a constant power. The distance covered by the body in time t is proportional to

If the velocity of car is increased by 20% then the minimum distance in which it can be stopped increase.

The engine of a train can impart a maximum acceleration of 1 ms^−2 and the brakes can give a maximum retardation of 3 ms^−2. The least time during which a train can go from one place to the other place at a distance of 1.2 km is nearly

A particle moves in a straight line so that its displacement x metre at a time t second is such that t= √x^2 −1. At Its x=2 acceleration will be

A particle starts from rest and travels a distance ‘s’ with uniform acceleration, then it travels a distance ‘2s’ with uniform speed and finally it travels a distance ‘3s’ with uniform retardation and comes to rest. If whole motion is in a straight line, the ratio of maximum velocity to average velocity is

A blind person after walking 10 steps in one direction, each of length 80 cm, turns randomly to the left or to right by 90 degree. After walking a total of 40 steps, the maximum displacement of the person from its starting point can be

A bullet emerges from a barrel of length 1.2m with a speed of 640 m/s^-1. Assuming constant acceleration, the approximate time that spends in the barrel after the gun fired is

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