a foot ball 450g falls vertically from rest onto the ground from a height pf 5m is if the force that conpresses the ball when it hits the ground is 100N what is the amount of compression of the ball?

Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero? express your answer in terms of some or all of the variables s, q1, q2 and k =14ï€ïµ0. if your answer is difficult to enter, consider simplifying it, as it can be made relatively simple with some work.

A20 cm long spring is attached to a wall. the spring stretches to a length of 22 cm when you pull on it with a force of 100 n. what is the spring constant

What are the north and south poles of a solenoid change with?