A person who weighs 68 kg steps onto a spring scale in the, Ask an Expert

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Q1. A 1600 {rm N} crate slides 15 {rm m} down a ramp that makes the angle of 35^circ with the horizontal. If the crate slides at a constant speed, how much thermal energy is created?

Q2. A person who weighs 68 kg steps onto a spring scale in the bathroom, and spring compresses by 0.79cm. (a) what is the spring constant? (b) What is the weight of another person who compresses the spring by 0.34cm?

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