Answer:
50J is kinetic energy
Explanation:
Mechanical energy, ME, is composed of both kinetic (KE) and potential energies (PE). Kinetic is given by KE = (1/2) mv^2 and potential is given by PE = mg, where m is the mass, v the velocity and g the acceleration due to gravity.
If a pendulum has 100J total energy, we can say that:
KE + ME = 100J
We know that 50J is kinetic energy. The balance, 50J, must tbe due to potential energy.
