you strike a ball of mass 0.113kg coming at you with a speed of 15.2 m/s with a metal rod. it is sent back the way it came at a speed of 10.2 m/s. if the rod makes contact with the ball for 0.312s what is the average force supplied by the rod to the ball when it is in contact with the ball?

Agroup of monkeys is trying to cross the river in a rowboat. the maximum buoyant force on the rowboat is 2,000 n. the weight of the rowboat is 1,000 n. each monkey has a weight of 150 n. how many monkeys can safely cross in the rowboat at one time? explain your reasoning, including any calculations you used to find the answer.