A pulley system does output work of 4000 J. It takes 5000 J of input work to do the job. What is the efficiency of the pulley system?

Player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 m/s. what is the horizontal velocity component of the ball to the nearest tenth of a m/s?

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

Asmall 21 kilogram canoe is floating downriver at a speed of 1 m/s. what is the canoe's kinetic energy?