Can someone do this please I don’t have time to watch this dang video cause I have other stuff to do

This question is worth 54 points ! rock falls from a ledge to the ground what energy conversion occurs during this process a potential to kinetic b kinetic to potential c thermal to mechanical d chemical to mechanical

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?