A pendulum bob with a mass of 0.29 kg is attached to a 1.5 m long string as shown. 1.5 m A B As the pendulum bob swings from point A, where the angle 0 = 30, to point B at the bottom of its arc, determine the change in the gravitational potential energy of the pendulum bob-earth system. J Supporting MaterialsA baseball with a mass of 144 g is thrown horizontally with a speed of 38.6 m/s (86 mi/h) at a bat. The ball is in contact with the bat for 1.20 ms and then travels straight back at a speed of 46.0 m/s (103 mi/h). Determine the average force (in N) exerted on the ball by the bat. Neglect the weight of the ball (it is much smaller than the force of the bat) and choose the direction of the incoming ball to be positive. (Indicate the direction with the sign of your answer.) 10152 X Can you write an expression for the average force exerted on the ball in terms of its change in momentum and the time the force acts? Can you write and expression for the change in momentum? Pay careful attention to the sign convention suggested in the statement of the problem. NA 5.50 gram bullet is fired from a rifle at a horizontal speed of 220 m/s. If the rifle has a weight of 35.0 N and is initially motionless, determine the recoil speed of the rifle. 031 * m/s Submit