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Grade: 12th pass

                        

An unruly demonstrate lifts a stone of mass 200 g from the ground and throws it at his opponent.at the time of projection the stone is 150 cm above the ground and has a speed of 3.00m/s.calculate the work done by demonstrate during the process .if it takes one second for the demonstrate to lift the stone and throw ,what horsepower does he use?

An unruly demonstrate lifts a stone of mass 200 g from the ground and throws it at his opponent.at the time of projection the stone is 150 cm above the ground and has a speed of 3.00m/s.calculate the work done by demonstrate during the process .if it takes one second for the demonstrate to lift the stone and throw ,what horsepower does he use?

4 years ago

Answers : (1)

Vikas TU
14149 Points
							
Total Work done = work done in lifting  +  work done in throwing the stone
                           = (200/1000) * 10 * (150/100) +  0.5* (200/1000) * 3*3
                           = 3.9 Joule.
1 Horse Power = 746 Joule
Then for 3.9 Joule it would be => 5.22788 x 10^-3 HP.
4 years ago
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