If a tunnel is dig along the diameter of earth and a body is dropped freely in it. The motion of this body is……….., if there is no frictional force of medium acting on it. (Fill in the blank).

If a tunnel is dig along the diameter of earth and a body is dropped f

1.	If a tunnel is dig along the diameter of earth and a body is dropped freely in it. The motion of this body is……….., if there is no frictional force of medium acting on it. (Fill in the blank).
Answer» SOLUTION :`IMPLIES SHM`.