Physics

Problem

Three books of masses

1\,\text{kg}

1.5\,\text{kg}

and

2\,\text{kg}

are placed on shelves

0.5\,\text{m}

1.0\,\text{m}

and

1.5\,\text{m}

high respectively. Taking the ground as the reference level and

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

, determine the total gravitational potential energy stored in the three books. a)

50\,\text{J}

24.5\,\text{J}

49\,\text{J}

44.1\,\text{J}