Kinetic energy is the energy that an object possesses due to its motion. In the options provided, we need to identify which scenario involves motion.
Let’s analyze each option:
- a) A space station orbiting Earth: This object is moving at high speed in orbit, which means it has significant kinetic energy.
- b) A rock on a mountain ledge: This rock is stationary and does not possess kinetic energy, as it is not moving.
- c) An archer with a flexed bow: While the bow is drawn and tense, it is not in motion yet. Kinetic energy would be present only once the arrow is released.
- d) A person sitting on a couch while watching TV: This person is also stationary and therefore has no kinetic energy.
- e) The high energy phosphate bonds of a molecule of ATP: This refers to potential energy stored in chemical bonds, not kinetic energy.
Given this analysis, the answer is a) A space station orbiting Earth, as it is the only option exhibiting kinetic energy due to its motion in orbit.