Answer:
They involve changes in energy. When a spring is compressed, the energy changes from kinetic to potential.
Answer:
the first choice
Explanation:
The reason why it is the first choice is because you would need to experiment twice before concluding your experiment one has to be normal height and the second test has to be higher also the mass on the car also is a factor to the experiment.
Answer:
3 1/4
Explanation:
closer to the 3 equaling a 1/4
