1. what is the common formula for work?
a. w=fav
c. w=fd2
b. w=fd
d. w= f2d

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

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

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?