A particle is projected at an angle alpha with horizontal from the foot of a plane whoose inclinaiton to horizontal is `beta`. Shwo that is will strike the plane at right angles if , `cot beta =2 tan(alpha - beta)` .

A particle is projected with a certain velocity at an angle alpha above the horizontal from the foot of an inclined plane of inclination 30^(@) . If the particle strikes the plane normally then alpha is equal to

A particle is projected with a certain velocity at an angle prop above the horizontal from the foot of an inclined plane of inclination 30^@ . If the particle strikes the plane normally, then prop is equal to.

A projectile is projected with speed u at an angle of 60^@ with horizontal from the foot of an inclined plane. If the projectile hits the inclined plane horizontally, the range on inclined plane will be.

A particle is projected up an inclined plane of inclination beta at na elevation prop to the horizon. Show that tan prop = cot beta + 2 tan beta , if the particle strikes the plane at right angles

A particle is projected up an inclined plane of inclination beta at na elevation prop to the horizontal. Show that (a) tan prop = cot beta + 2 tan beta , if the particle strikes the plane at right angles (b) tan prop = 2 tan beta , if the particle strikes the plane horizontally.

A particle is projected horizontally with a speed u from the top of plane inclined at an angle theta with the horizontal. How far from the point of projection will the particle strike the plane ?

A particle is projected up an inclines plane. Plane is inclined at an angle theta with horizontal and particle is projected at an angle alpha with horizontal. If particle strikes the plane horizontally prove that tan alpha=2 tan theta

A particle is projected from a point A with velocity sqrt(2)u an angle of 45^(@) with horizontal as shown in figure. It strikes the plane BC at right angles. The velocity of the particle at the time of collision is

(1+tan alpha tan beta)^2 + (tan alpha - tan beta)^2 =

A particle is projected up an inclined plane of inclination beta at an elevation prop to the horizontal. Find the ratio between tan prop and tan beta , if the particle strikes the plane horizontally.