A particle is projected with velocity u at an angle `alpha` from a point P on a horizontal plane strikes the plane at Q. The average velocity of the particle for its journey from P to Q is-

A particle is projected with velocity v at an angle theta aith horizontal. The average angle velocity of the particle from the point of projection to impact equals

A particle is projected with velocity v at an angle theta aith horizontal. The average angle velocity of the particle from the point of projection to impact equals

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

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

A particle is projected from a point A with velocity usqrt2 at an angle of 45^(@) with horizontal as shown in the figure. It strikes the plane BC at right angles. The velocity of the particle at the time of collision is

Two inclined planes OA and OB intersect in a horizontal plane having their inclinations alpha and beta with the horizontal as shown in figure. A particle is projected from P with velocity u along a direction perpendicular to plane OA. The particle strikes plane OB perpendicularly at Q. The path of the particle from P to Q is

Two inclined planes OA and OB intersect in a horizontal plane having their inclinations alpha and beta with the horizontal as shown in figure. A particle is projected from P with velocity u along a direction perpendicular to plane OA. The particle strikes plane OB perpendicularly at Q. The path of the particle from P to Q is