Tim, with mass 53.5 kg, climbs a gymnasium
rope a distance of 4.7 m.
the acceleration of gravity is 9.8 m/s2 .
how much potential energy does tim gain?
answer in units of j

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to:

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.