Jasmine is riding a bicycle and her very small brother, Simir, is riding his tricycle. What must Simir do to have the same kinetic energy as his big sister Jasmine?

Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work

What occurs during a combustion reaction

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?