Question

A stone is projected on an incline plane which is inclined at an angle 'a' with horizontal. It has found that
the stone strikes the inclined plane perpendicularly. Initial velocity of projection is at an angle 'B' with
inclined plane. Select the CORRECT alternatives.
(A) If velocity of projection is double then angle at which stone strikes the incline plane remains same.
(B) Distance of particle from point of projection never decreases with time for above condition.
(C) If angle of projection is change keeping angle of incline same, still the stone can strike incline plane
perpendicularly by adjusting speed of projection.
(D) Time of flight on incline plane is
2usin(B) /gcos(a)
​

Answer 1

Answer:

B is the correct alternative as it is true

Answer 2

Answer:

The correct answer is A,B,D