5. A car is sitting on top of a hill. It is 7500 kg. The hill is 100m high. how much potential energy does the car have?
O A. 0.01 J
O B.75J
O C.7,350,000 u
D37,500,000 J

Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)