Question
Lifting, transporting or supporting heavy objects by hand or bodily force is one definition of:a. working at heightb. a mobile scaffold towerc. a sack truckd. manual handling.
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In which of the following is work done by the external agent described? (a) The motor of a lift going up with the same acceleration as the acceleration due to gravity (b) A man carrying a bucket of water on level ground. (c) A crane lowering a load vertically with a constant velocity (d) A man carrying a bucket of water on a stair case
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