A tennis player pushes the tennis ball with her racquet over a distance of 0.5m. The ball gains (kinetic) energy of 50J. What was the average force during the "serve"?

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form

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?