A box is lifted slowly from a height of to

PHYSICS · Single correct · CBSE · Physics · Work and Energy · Work and Energy

Problem

4\,\text{kg}

box is lifted slowly from a height of

1.2\,\text{m}

3.5\,\text{m}

. Take

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

. The work done by gravity during this lift is closest to (a)

+9.0\times10^{1}\,\text{J}

(b)

-1.4\times10^{2}\,\text{J}

(c)

-9.0\times10^{1}\,\text{J}

(d)

-4.5\times10^{1}\,\text{J}