Philip P. answered • 05/27/14

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The cart is lifted to a height, h:

h = (8 meters)*sin(12

h = (8 meters)*sin(12

^{o}) = 1.66 mThe force in the vertical direction is:

Fy = 120N*sin(22

^{o}) = 44.95NWork = F*d = (44.95)*(1.66) = 74.62 joules

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74.62 J = Mgh

Where M is the cart's mass, g is the acceleration due to gravity, and h is the height the cart is pulled up.

74.62 J= M*(9.8 m/s

^{2})*(1.66 m)4.59 kg = M, the mass of the cart