Asap Please you can check the other question in my account thanks brainlist to the correct one.

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

A100 kg running back runs at 5m/s into a stationary linebacker. it takes 0.5 for the running back to be completely stopped

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final