Tina and her puppy are tugging on a rope, each pulling on opposite ends.

when is tina doing work?

a. the entire time she plays with the puppy
b. whenever she pulls the puppy toward her
c. when she holds the rope steady as the puppy pulls it
d. when she lets go of the rope and the puppy pulls it away

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