At what velocity does a 10kg book dropped from 5 meters hit the ground at?

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?

Avoltaic cell converts chemical energy to