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Two Blocks and a Spring
A 4.0 block hangs by a light string that passes over a massless, frictionless pulley and is connected to a 6.0 kg block that starts off at rest. The question asks to find the speed of the block after it fell 40 cm. I know how to do the problem using conservation of energy.
However, how would the problem be different if the string was not massless?
Customer support service by UserEcho
From the energy conservation view, if the pulley was not massless, it would take >0 kinetic energy for it to rotate.
Hope this helps!