Give an example where the velocity of an object is zero but its acceleration is not zero.

Give examples for the particle where (a) the velocity is in opposite direction to the acceleration (b)the velocity of the particle is zero but is acceleration is not zero.

a) In a frame of reference S( though the net force is zero, the net acceleration is not zero. b) In a frame of reference S_2 though the net force is not zero, the net acceleration is zero. c) In a frame of reference S_3 the net acceleration is zero whenever the net force is zero.

Can the direction of velocity of an object reverse when its acceleration is constant ? If so give an example, if not, explain why.

Give few examples where displacement of an object is in the direction opposite to the force acting on the object.

Can you give some examples, where the displacement of the object is zero ?