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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?

4 years ago

Answers : (1)

Vikas TU
13784 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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