A ball thrown down the incline strikes at a point on the incline 25m below the horizontal as shown in the figure. If the ball rises to a maximum height of 20m above the point of projection, the angle of projection `alpha` (with horizontal x axis) is

A ball is projected as shown in figure. The ball will return to point:

A ball thrown by one player reaches the other in 2 s . The maximum height attained by the ball above the point of projection will be about.

A projectile is projected on an inclined plane as shown in figure. 'D' is a point of maximum height from inclined plane then :

A particle of mass m is projected with an initial velocity U at an angle theta to the horizontal. The torque of gravity on projectile at maximum height about the point of projection is

Two balls are thrown from an inclined plane at angle of projection alpha with the plane one up the incline plane and other down the incline as shown in the figure. If R_1 & R_2 be their respective ranges, then:

A ball is thrown from the top of a tower in vertically upward direction. Velocity at a point h m below the point of projection is twice of the velocity at a point h m above the point of projection. Find the maximum height reached by the ball above the top of tower.

A ball is thrown horizontally from a height of 20m .If hits the ground with a velocity of 3 times the velocity of projection.The velocity of projection is 3.5x m//s then x is

A ball projected with a velocity of 28m/sec has a horizontal range 40m. Find the two angles of projection.