Question

As a pendulum swings back and forth, its total energy is 16 J. What is its potential energy at 3/4 its maximum height?

Answer 1

12 Joules

Step-by-step explanation:

Answer 2

Let height h go from 0 ⇒ 1:

`E = E_k_i_n + E_p_o_t = 16`

at h = 3/4:


`E = (1)/(4) E_k_i_n + (3)/(4) E_p_o_t = 16 \\ \\ E = 4 + 12 = 16 \\ \\ E_k_i_n = 4J \\ \\ E_p_o_t = 12J`