Alaser pointer is placed on a platform that rotates at a rate of 60 revolutions per minute. the beam hits a wall 10 m away, producing a dot of light that moves horizontally along the wall. let θθ be the angle between the beam and the line through the searchlight perpendicular to the wall.

Explanation:

As we know that the angle made with the vertical is given so we have

so we have

now differentiate both sides with time

now we know that

now we have

. west

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.