2. An astronaut is piloting her spacecraft toward the International Space Station. To stop the spacecraft, she fires
the retro-rockets, which cause the spacecraft to slow down
from 20.0 m/s [E] to 0.0 m/s in 12 s. 67
(a) What is the acceleration of the spacecraft?
(b) What is the displacement of the spacecraft when it
comes to rest?

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