Select all that apply.

a pulley can be used to

1change the direction of the applied force
2increase the amount of work done
3multiply the effort force
4change the weight of the resistance

Abicycle slows down when the rider applies the brakes. what type of energy transformation is involved in this example? a. kinetic energy into heat energy b. heat energy into potential energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy