posted by Logan .
Which of the following represent examples of the following situation: An object that starts at the origin at t=0 and at some time later its displacement from origin is zero but the velocity is not zero:
1)An object in a uniform circular motion around a circle passing through origin
2)A tennis ball thrown toward a wall and returning to the ground
3)A projectile thrown at an angle of 45 degrees and returning to the ground
4)A ball thrown straight up and returning to the ground