A sled with a mass of 5.80 kg is pulled along the ground through a displacement

Question

A sled with a mass of 5.80 kg is pulled along the ground through a displacement given by d ? =(5.78m)x ^   . (Let the x axis be horizontal and the y axis be vertical.)

Part A

How much work is done on the sled when the force acting on it is F ? =(2.89N)x ^ +(0.131N)y ^  ? (J)

Part B

How much work is done on the sled when the force acting on it is F ? =(2.89N)x ^ +(0.231N)y ^  ? (J)

Part C

If the mass of the sled is increased, does the work done by the forces in parts A and B increase, decrease, or stay the same? (explain)

Explanation / Answer

Disp = 5.78x^

Work = F.D = (2.89x^ + 0.131y^) . 5.78x^ = 2.89*5.78 +0 = 16.64 J

b) F = 2.89x^ + 0.231y^

D = 5.78x^

W = F.D = (2.89x^ + 0.231y^) . 5.78x^= 16.64 J

c)Work will remain same if the mass is increased because the force due to mass will act downward and displacement is along x-axis.

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