Physics

Physics

Problem

A box of mass

4\,\text{kg}

is pushed up a frictionless plank

5\,\text{m}

long onto a truck platform that is

2\,\text{m}

high. Taking

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

, determine the work done against gravity. a)

39.2\,\text{J}

b)

196\,\text{J}

c)

78.4\,\text{J}

d)

80\,\text{J}

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