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A particle is projected at an angle of 45^{\circ} from a point lying 2 m from the foot of a wall. It just touches the top of the wall and falls on the ground 4 m from it. The height of the wall is

A particle is thrown from a stationary platform with velocity v at an angle of 60° with the horizontal. The range obtained is R. If the platform moves horizontally in the direction of target with velocity v, the range will increase to

An observer on ground sees a boat cross a river of width 800 m perpendicular to its stream in 200seconds.He also finds a man on a raft floating at speed of 3 m/s with river.The distance travelled by boat as seen by man on the raft in crossing the river is

A water fountain on the ground sprinkles water all around it. If the speed of water coming out of the fountain is v, the total area around the fountain that gets wet is :-

Two guns A and B can fire bullets at speeds I km/s and 2 km/s respectively. From a point on a horizontal ground, they are fired in all possible directions. The ratio of maximum areas covered by the bullets fired by the two guns, on the ground is

A butterfly is flying with a velocity 4√2 m/s in North-East direction. Wind is slowly blowing at 1 m/s from North to South. The resultant displacement of the butterfly in 3 seconds is:

A flag is mounted on a car moving due North with a velocity of 20 km/hr. Strong winds are blowing due East with velocity of 20 km/hr. The flag will point in direction:-

Three ships A, B & Care in motion. Ship A moves relative to B is with speed v towards North-East. Ship B moves relative to C with speed v towards the North-West. Then relative to A. C will be moving towards

A boat having a speed of 5 km/hr in still water, crosses a river of width 1 km along the shortest path in 15 minutes. The speed of the river in Km/hr.

Particle is projected up the incline such that the component of velocity along the incline is 10 m/s. Time of flight is 2 seconds and maximum perpendicular distance during the motion from the incline is 5 m. Then the velocity of the projection will be:-

A ball is projected horizontally. After 3 s from projection its velocity becomes 1.25 times the velocity of projection. Its velocity of projection is:

Suppose a player hits several baseballs. Which baseball will be in the air for the longest time?

A boy throws a ball from shoulder height at an initial velocity of 30 m/s. Spending 4.8 s in air, the ball is caught by another boy as the same shoulder-height level. What is the angle of projection?