Write down three examples of machines (different from ones in the lesson) in each category below.

1.machines that you go faster
2.machines that you do things you could not otherwise do
3.machines that make you stronger
4.machines that put force where you want it

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy