A 70 kg student balances a 1200 kg elephant (d=2.0 m) on a hydraulic lift. What is the diameter of the piston the student is standing on? When a second student joins the first, the piston sinks 35 cm. What is the second student's mass?

Why is metal often used for cooking pan?

Work = force × a. work b. energy c. distance d. momentum

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.