A weight lifter jerks `220 kg` vertically through `1.5` metre and holds still at that height for two minutes. The work done by him in lifting and in holding it still are respectively

Four men lift a 250 kg box to a height of 1 m and hold it without raising or lowering it. How much work is done by men in lifting the box?

The work done in lifting a mass of 1 kg to a height of 9.8 m is

A person holds on a weight of 10 kg at a height of 5m above the ground for 5 minutes. Work done by him is

A person holds on a weight of 10 kg. at a height of 5m. Above the ground for 5 minutes. Work done by him is

Four men lift a 250 kg box to a height of 1 m and hold it without raising or lowering it. (i) How much work is done by men in lifting the box? (ii) How much work is done in just holding it? (Take g=10ms^(-2) ).

A body of mass 1 kg is lifted through a height of 1m, then its work done is

The work done in lifting 1 kg mass to a height of 9.8 m is about