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1. Homework Statement
This question came up recently, and i personally have been weak regarding work and energy, i have only just started to understand newtons laws sufficiently. There is a scan of the question attached. Could i please have an explanation this question?
A 0.5kg mass is projected down a rough circular track (radius = 3.1 m) as shown. The speed of the mass at point is 3.1 m/s, and at point , it is 6.3 m/s. How much work is done on the mass between and by the force of friction?
2. Homework Equations
i tried to use the work energy theorem ie W = ΔK but it didn't feel correct
3. The Attempt at a Solution
This question came up recently, and i personally have been weak regarding work and energy, i have only just started to understand newtons laws sufficiently. There is a scan of the question attached. Could i please have an explanation this question?
A 0.5kg mass is projected down a rough circular track (radius = 3.1 m) as shown. The speed of the mass at point is 3.1 m/s, and at point , it is 6.3 m/s. How much work is done on the mass between and by the force of friction?
2. Homework Equations
i tried to use the work energy theorem ie W = ΔK but it didn't feel correct
3. The Attempt at a Solution
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