At point A the roller coaster car has 480 Joules of gravitational potential energy. At point C it only has 290 Joules of gravitational potential energy. How much kinetic energy does the car have at point C? Select one:

480 Joules

0 Joules

190 Joules

290 Joules

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.