A stone projected at an angle of `60^@` from the ground level strikes at an angle of `30^@` on the roof of a building of height `h`. Then the speed of projection of the stone is:

A stone is thrown horizontally from the top of a cliff and strikes the ground after 5 seconds, at an angle of 45^(@) with the horizontal . Calculate (i) height of the cliff. (ii) speed of projection of the stone .

A particle at a height h from the ground is projected with an angle 30^@ from the horizontal, it strikes the ground making angle 45^@ with horizontal. It is again projected from the same point with the same speed but with an angle of 60^@ with horizontal. Find the angle it makes with the horizontal when it strikes the ground

A stone is thrown from the top of a tower at an angle of 30^(@) above the horizontal level with a velocity of 40 m/s. it strikes the ground after 5 second from the time of projection then the height of the tower is

A stone projected at angle 'theta' with horizontal from the roof of a tall building talls on the ground after three second. Two second after the projection it was again at the level of projection. Then the height of the building is -

A stone projected at angle theta with horizontal from the roof of a tall building falls on the ground after three seconds. Two second after the projection it was again at the level of projection. Then the height of the building

A stone is dropped from the roof of a building takes 4s to reach ground. The height of the building is

Two bodies are projected with the same velocity. If one is projected at an angle of 30^(@) and the other at an angle of 60^(@) to the horizontal, the ratio of the maximum heights reached is

A stone is projected from the ground with velocity 50(m)/(s) at an angle of 30^@ . It crosses a wall after 3 sec. How far beyond the wall the stone will strike the ground (g=10(m)/(sec^2) ?

A stone is projected at an angle alpha to the horizontal from the top of a tower of height 3h If the stone reaches a maximum height h above the tower, then calculate the distance from the foot of the tower where particle strikes the foot of the where particle strikes the ground.