Which of the following is an example of $\mathrm{kinetic} \mathrm{energy}$?

• A. A stretched bow ready to shoot an arrow
• B. A moving car traveling down the highway
• C. A rock resting at the top of a hill
• D. A battery storing electrical energy

Answer: (B)

Verified step by step guidance

1. Step 1: Understand the definition of kinetic energy. Kinetic energy is the energy an object possesses due to its motion. It depends on the mass and velocity of the object.
2. Step 2: Recall the formula for kinetic energy: \(\text{KE} = \frac{1}{2} m v^{2}\), where \(m\) is the mass and \(v\) is the velocity of the object.
3. Step 3: Analyze each option to determine if the object is in motion. For example, a stretched bow has potential energy stored, not kinetic energy, because it is not moving.
4. Step 4: Identify that a moving car traveling down the highway has kinetic energy because it is in motion with a certain velocity.
5. Step 5: Conclude that objects at rest, like a rock on a hill or a battery storing energy, do not have kinetic energy but may have potential or stored energy instead.