Physics

Problem

A 3 kg object is taken from ground level to the top of a 10 m high hill along a frictionless spiral path of length 50 m. Taking

g = 9.8\,\text{m s}^{-2}

, calculate the work done by the gravitational force. a)

-4.90 \times 10^{2}\,\text{J}

+2.94 \times 10^{2}\,\text{J}

-2.94 \times 10^{2}\,\text{J}

-1.47 \times 10^{3}\,\text{J}