A crane lifts a load with a vertical cable

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A crane lifts a

50\,\text{kg}

load with a vertical cable. After raising it to a height of

2\,\text{m}

, the crane carries the load horizontally for

8\,\text{m}

at the same height and speed. The magnitude of tension in the cable remains

500\,\text{N}

. How much work does the tension perform during the horizontal

8\,\text{m}

motion? (a)

4000\,\text{J}

(b)

1000\,\text{J}

(c)

0\,\text{J}

(d)

3920\,\text{J}