A simple pendulum 1m long has a Bob of 10kg. If the pendulum swings from a horizontal position, the KE of the Bob at the instant it passes through the lowest position of it's path is
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Solution
By law of energy conservation, first at the horizontal position only potential energy mgh=100 but when at the lowest position only kinetic energy(no height), as total energy is conserved. mgh+0=k.e.+0 k.e.=100