exerts balanced forces that helps it from moving. exerts a force equal to the weight of the hammer. exerts an unbalanced force that changes its velocity. exerts an equal and opposite force back on the hammer.
When a hammer strikes a nail, the nail

Options:
- exerts balanced forces that helps it from moving.
- exerts a force equal to the weight of the hammer.
- exerts an unbalanced force that changes its velocity.
- exerts an equal and opposite force back on the hammer.

exerts an equal and opposite force back on the hammer.