What item did the first vending machines in the united states dispense?

What is work? how much work is done to move an object 0 meters?

Which car has the most kinetic energy? a. a car of mass 1000 kg with a speed of 3 m/s b. a car of mass 2000 kg with speed 7 m/s c. a car of mass 1000 kg with speed 7 m/s d. a car of mass 2000 kg with speed 3 m/s

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?