Question

Locate the centre of mass of a system of two spherical masses of 5kg and 10kg kept with their centres 1m apart
2/3 of the from the 5kg mass, since

2*5 = 1*10
The work done by boy pulling a snow sled up a hill is 425 j.what is the power expended by the boy if he pulls on the sled for 10.5s?
The work done by boy pulling a snow sled up a hill is 425 j.what is the power expended by the boy if he pulls on the sled for 10.5s?please

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