Question

table 1: energy change situations

in which situations is a form of potential energy changing to a form of kinetic energy?

a) situations 1 and 3
b) situations 2 and 5
c) situations 2, 3, and 4
d) situations 1, 4, and 5

Explanation:

Step1: Analyze each situation

• Situation 1: A tiger running has chemical potential energy (from food) converting to kinetic energy.
• Situation 2: Rubbing hands converts mechanical energy (from muscle movement) to thermal energy (not potential to kinetic).
• Situation 3: An inflated balloon rising - if it's a helium balloon, the buoyant force (buoyant potential energy) converts to kinetic energy as it moves up.
• Situation 4: A battery - operated toy car: chemical potential energy (in battery) converts to kinetic energy.
• Situation 5: Fireworks exploding: chemical potential energy converts to sound, light, and thermal energy (not mainly to kinetic).

Step2: Check the options

• Option A: Situations 1 (chemical potential to kinetic) and 3 (buoyant potential to kinetic) are correct.
• Option B: Situation 2 (mechanical to thermal) and 5 (chemical to sound/light/thermal) are wrong.
• Option C: Situation 2 is wrong.
• Option D: Situation 5 is wrong.

Answer:

A. situations 1 and 3