Which of the following examples describes an increase in potential energy?
a bicycle going down a hill

a basketball falling through a net

a roller coaster moving down the track

a paint can being carried up a ladder

Fill in the blank. the number of each type of element in the compound (other than 1) is represented by a small number to the right of the element symbol.

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

If anyone who can me with this hw? i would really appreciate it