Question: (c) A spring whose stiffness is 890 N/m has a relaxed length of 0.64 m. If the length of the spring changes from 0.54

(c) A spring whose stiffness is 890 N/m has a relaxed length of 0.64 m. If the length of the spring changes from 0.54 m to 0.93 m, what is the change in the potential energy of the spring? Change of potential energy = J Part 4 (d) You observe someone pulling a block of mass 48 kg across a low-friction surface. While they pull a distance of 4 m in the direction of motion, the speed of the block changes from 4 m/s to 6 m/s. Calculate the magnitude of the force exerted by the person on the block. F = N i

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Answer The potential energy stored in a spring is given by the formula U12kx2 where U is the potenti... View full answer

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