Question

which option is an example of chemical energy being transformed into kinetic energy?

a. a battery powering a flashlight

b. a rocket engine igniting its fuel during liftoff

c. a ball rolling down a hill

d. a plant storing energy from the sun in its leaves

Explanation:

• Option A: A battery powering a flashlight converts chemical energy to electrical energy (then to light), not kinetic.
• Option B: A rocket engine ignites fuel (chemical energy in fuel) which produces thrust to move the rocket, converting chemical energy to kinetic energy (motion of the rocket).
• Option C: A ball rolling down a hill converts gravitational potential energy to kinetic energy, no chemical energy involved.
• Option D: A plant storing energy from the Sun is photosynthesis, converting solar energy to chemical energy (stored in glucose), not kinetic.

Answer:

B. A rocket engine igniting its fuel during liftoff