An 80 kg stunt man jumps from a height of 3.0 meters onto a platform with a large spring under it. What is the total displacement of the platform if the spring constant is 2500 N/m?

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.

How are series and parallel circuits simililar? both have multiple paths for electrons to travel. both require resistors in their circuits. both require a switch to complete the circuit. both have at least one path for electrons to travel.

Aball thrown by ginger is moving upward through the air. diagram a shows a box with a downward arrow. diagram b shows a box with an upward arrow. diagram c shows a box with a downward and upward arrow equal in size. diagram d shows a box with a downward and upward arrow with the downward arrow larger in size. which force diagram represents the forces on the ball? you may neglect the effects of air resistance.