Determine the forces applied on the supports
Assume that a crate of mass 7.5 kg is positioned on a plank a distance of 3.9m from the left end. The plank is 12 m long and the two supports are at 3m and 10m. Determine the forces applied on the supports.
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Determine how much energy (in Joules) should you use to stretch it the other 15 cm (from 25 cm to 40 cm)? Please illustrate your work.
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