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A 30kg child climbs which is 45cm above the ground. If she is able to get...

A 30kg child climbs which is 45cm above the ground. If she is able to get the swing to rise to an angle of 60 degrees with the vertical. The chain has a length of 4.2m and she is moving at a speed of 3m/s. Determine the energy lost due to friction?

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Answer #1

As we know that;

Rise in P.E= 30*10*0.45

Then,

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