Question

1. from \mechanical energy\... when you hit a hammer with a nail, you are using: (5 points)

○ kinetic energy
○ chemical energy
○ mechanical energy
○ potential energy

1. from \mechanical energy\... the \work\ done on the nail was ______ (5 points)

○ the nail not moving
○ movement of the nail deeper into the wood
○ the nail transferring energy back into the hammer
○ none of the above

Explanation:

1. For question 16: When swinging a hammer to hit a nail, the hammer is in motion, and kinetic energy is the energy of motion. While the hammer has mechanical energy (a combination of kinetic and potential), the active energy used to drive the nail is its kinetic energy in motion.
2. For question 17: In physics, work is defined as force applied over a distance. When the hammer hits the nail, the force from the hammer causes the nail to move into the wood, which is the work done on the nail.

Answer:

1. kinetic energy
2. movement of the nail deeper into the wood