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Question 14 A small rock with mass 0.12kg is fastened to a massless string with length 0.53 m to form a pendulum. What is the

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Question 14 A small rock with mass 0.12kg is fastened to a massless string with length 0.53 m to form a pendulum. What is the change in potential energy (in J} when it makes an angle of45 degree from the vertical? Round your answer to 2 decimal places

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