Question

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

Answer 1

Answer:

KE = 4 J

Explanation:

As we know that for swinging pendulum the total energy of the pendulum is always conserved

so here its total energy is

$E = 16 J$

now when the pendulum will reach to its maximum height then its total energy will convert into potential energy

so here at 3/4 of its maximum height the potential energy will also become 3/4 times of total energy

so it is given as

$U = \frac{3}{4}(16) = 12 J$

now by energy conservation we will have

$K + U = 16 J$

$K + 12 = 16$

K = 4 J