Question

consider the diagram of a pendulum’s motion shown above. a pendulum can be used to model the change from potential energy to kinetic energy and back to potential energy. if you pull the bob back to point a and release it, potential energy is converted to kinetic energy. what do you think happens to the energy at point c? a kinetic energy increases. b potential energy decreases. c potential energy is converted to kinetic energy. d kinetic energy is converted to potential energy.

Explanation:

In a pendulum's motion, at the lowest point (B), kinetic energy (KE) is maximum and potential energy (PE) is minimum. At the highest points (A and C), the pendulum momentarily stops, so KE is zero and PE is maximum. When moving from B to C, the pendulum slows down as it gains height. So, KE (energy of motion) is converted into PE (stored energy due to height). Option A is wrong (KE decreases at C). Option B is wrong (PE increases at C). Option C is wrong (at C, PE is max, so it's not converting PE to KE; that happens when moving from A/B to lower points). Option D correctly describes the energy change at C: KE is converted to PE as the pendulum rises to C.

Answer:

D. Kinetic energy is converted to potential energy.