What percentage of americans get no exercise in a day

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

If a star is moving toward earth, it is

What is the state of matter with a specific volume but no definite shape