A 34.0 cm long pendulum with a 245-g bob swings through at an angle of 180 degrees. Choose the reference configuration as the point where the pendulum string is vertical. Assuming the pendulum remains taut, what is the gravitational potential energy of the pendulum bob-Earth system when the pendulum string makes an angle of a. 90 degrees with the vertical? and b. 40.5 degrees with the vertical? c. What is the gravitational potential energy of the pendulum bob-Earth system at the lowest point of the pendulum's motion?

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Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.