A boy lifts a 30N toy car 2 meters above the ground. How much work did the boy do on the car?

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

Discuss how the hardness or softness of the landing surface is related to the time required to stop the egg

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?