A target is fixed on the top of a pole 13 metre high. A person standing at a distance of 50 metre form the pole is capable of projecting a stone with a velocity `10 sqrt(g) ms^(-1)`. If he wants to strike the target in shortest possible time, at what angle should he project the stone ?

A target is fixed on the top of a tower 13 m high. A person standing at a distance of 50 m from the pole is capable of projecting a stone with a velocity 10 sqrt(g) ms^-1 . If he wants to strike the target in shortest possible time, at what angle should he project the stone ?

A truck is moving with a constant velocity of 54 km h^-1 . In which direction (angle with the direction of motion of truck) should a stone be projected up with a velocity of 20 ms^-1 , from the floor of the truck of the truck, so as to appear at right angles to the truck, for a person standing on earth ?

A stone is projected from the ground with a velocity of 14 ms ^(-1). One second later it clears a wall 2m high. The angle of projection is (g = 10 ms ^(-2))

At what angle should a body be projected with a velocity 20 ms^(-1) just to pass over the obstacle 12 m high at a horizontal distance of 24 m ? Take g= 10^-2) .

A river is flowing from west to east at a speed of 5 metres per minute . A man on the south bank of the river , capable of swimming at 10 metres per minute , in still water , wants to swim across the river in the shortest time . He should swim in a direction

A river is flowing from west to east at a speed of 5 metres per minute.A man on the south bank of the river, capable of swimming at 10 metres per minute in still water, wants to swim across the river in the shortest time. He should swim in a direction.

An object is project with a speed 10ms^(-1) at an angle of 30^@ with the horizontal. It breaks into n equal fragments during its motion . One fragment strikes the ground at a distance of sqrt(3)m from the point of projection. The centre of mass of the remaining fragments strikes the ground at a distance of 7sqrt(3)m from the point of projection . If all fragments strike the ground at the same time , Find the value of n.

A stone is dropped from a height of 100m .At the same instant another stone is projected vertically upwards with velocity of 50ms^(-1) .If g=10ms^(-2) ,the height from the ground at which the 2 stones meet is