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
[tex]E = 16 J[/tex]
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
[tex]U = \frac{3}{4}(16) = 12 J[/tex]
now by energy conservation we will have
[tex]K + U = 16 J[/tex]
[tex]K + 12 = 16[/tex]
K = 4 J
