Physics

Problem

5\,\text{kg}

box is moved from a shelf at height

1\,\text{m}

above the floor to a platform at height

4\,\text{m}

. The path followed is: (i) lifted vertically from

1\,\text{m}

2\,\text{m}

, (ii) carried horizontally for

3\,\text{m}

at the

2\,\text{m}

level, and (iii) lifted vertically from

2\,\text{m}

4\,\text{m}

. For

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

, (a) find the work done by gravity in each segment, and (b) hence obtain the total work done by gravity for the complete path. a. (a) Segment (i) b. (a) Segment (ii) c. (a) Segment (iii) d. (b) Total work

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