A horizontal force of 100 N is applied to the object

Which type of wave can travel without a medium

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.

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?