Briefly summarize how the pulleys worked with respect to changes in effort force and effort distance compared with resistance force and resistance distance what are the advantages of using pulleys what do you think would happen to the mechanical advantage if you needed a third movable pulley

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.