Question

when a pendulum is held high and taut and then is released, the pendulum begins to swing. whats the correct order of the energy transformations in this example? (pe stands for potential energy.) a. gravitational pe → elastic pe → thermal energy b. gravitational pe → kinetic energy → thermal energy c. kinetic energy → elastic pe → thermal energy d. kinetic energy → gravitational pe → thermal energy e. thermal energy → gravitational pe → kinetic energy

Explanation:

When the pendulum is held high, it has gravitational potential energy due to its height. When released, it starts moving and this potential energy is converted into kinetic energy. As it swings, air - resistance and friction convert some of its mechanical energy into thermal energy.

Answer:

B. gravitational PE → kinetic energy → thermal energy