A 2.0 N force F is applied to a bar that can pivot around its end as shown below. The force is parallel to the bar and is r = 0.50 m away from the end.
What is the torque on the bar?

Abatter hits a 0.140-kg baseball that was approaching him at 30 m/s and, as a result, the ball leaves the bat at 40 m/s in the reverse of its original direction. the ball remains in contact with the bat for 2.0 ms. what is the magnitude of the average force exerted by the bat on the ball?