A crane lowers a load vertically downward at constant speed for .

PHYSICS · Multi-part · CBSE · Physics · Work and Energy · Work and Energy

Problem

A crane lowers a 200 kg200\,\text{kg} load vertically downward at constant speed for 2 m2\,\text{m}. (a) What is the sign (positive, negative or zero) of the work done by the tension in the cable? (b) What is the sign of the work done by the gravitational force on the load? Give reason in each case.

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