Question

students conducted a pendulum experiment to demonstrate the conservation of energy principle. the students hold the pendulum at point a, as shown in the diagram, and release it.
where would there be both potential and kinetic energy during the swing?
select all that apply.

• point a
• point b
• point c
• point d
• point e

Explanation:

1. Understand Energy Types: Potential energy (PE) depends on height (PE = \(mgh\)), kinetic energy (KE) depends on motion (KE = \(\frac{1}{2}mv^2\)). At maximum height (A, E), velocity is 0 (KE = 0), so only PE. At lowest point (C), height is minimum (PE = 0), so only KE.
2. Analyze Intermediate Points (B, D): Points B and D are between the highest (A/E) and lowest (C) positions. Here, the pendulum is moving (so KE > 0) and has some height above C (so PE > 0). Thus, both PE and KE exist at B and D.

Answer:

B. Point B, D. Point D