Ed rolls a ball forward across the floor. it hits a wall 12 meters away and rolls back along the same path. it stops 5 meters from the wall. what is the displacement of the ball? 17 meters forward 5 meters forward 7 meters forward 12 meters forward

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

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.