1. A solid plastic. sphere on the left {mass m=1 kg, and radius r = 1|] em ) initially at rest starts to rotate about its axis owing to a tangential force F as shown. The hall reaches the velocity 1:11} this in 5 see after the start. (a) Find the magnitude of the force F. F " (b) If the force is applied as shown on the right: will the ball still need the same magnitude of F or not to reach that velocity in 5 see? Explain