Question

An object A is kept fixed at the point x = 3m and y = 1.25m on a plank P
raised above the ground. At time t O the object starts moving along the +x
direction with an acceleration 1.5m/s². At the same instant a stone is
projected from the origin with a velocity u. A stationary person on the ground
observes the stone hitting the object during its downward motion at an angle of
45° to the horizontal. All the motions are in x - y plane. (Take g = 10m/s2]
(A) The time after which the stone hits the object is 1 second
(B) Relative acceleration between object and stone is non-zero
(C) During the motion relative velocity remain horizontal only at one
instant.
(D) Angle of projection with horizontal is greater than 45°​

Answer 1

Answer:

a,b,c

Explanation:

there are 3answer a b c are correct