5. Which of the folowing statements about the energy ofa pendulum is true? OA The kinetic energy is always greater than both the potential energy and the total energy.
OB The potential energy is always greater than both the kinetic energy and the total energy.
C The total energy is always greater than both the potential energy and the kinetic energy
OD None of the above are true.

Hydrogen and helium are both members of?

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.

A75-hp (shaft output) motor that has an efficiency of 91.0 percent is worn out and is to be replaced by a high-efficiency motor that has an efficiency of 95.4 percent. the motor operates 4368 hours a year at a load factor of 0.75. taking the cost of electricity to be $0.12/kwh, determine the amount of energy and money saved as a result of installing the high-efficiency motor instead of the standard motor. also, determine the simple payback period if the pu