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A man can throw a stone horizontally wit...

A man can throw a stone horizontally with velocity `v_(1) = 5m//s`. What velocity `v_(2)` can he generate in the same stone if he throws it with the same force while standing on stakes on smooth ice ? The mass of the stone `m = 1` kg, the mass of the man `M = 60` kg. Will the man produce the same power in each case ?

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NN GHOSH-FRICTION, WORK POWER AND ENERGY-Exercises (B)
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  7. If the system if Figure 7.13 is released from rest in the configuratio...

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  8. A body of mass m starts from rest down a plane of length l at an angle...

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  9. A block A of mass 4 kg is placed on another block B of mass 5 kg , and...

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  10. A block A of 10 kg rests on a rouch, horizontal table and is connected...

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  11. A block of mass m slides down an inclined right angled trough .If the ...

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  12. A force of 5 N acts on a 15 kg body initially at rest. The work done b...

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  13. The force required to tow boat at a constant velocity is proportional ...

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  14. What power is developed by a grinding machine whose wheel has a radius...

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  15. Consider the system of weights P(1)=1 kg,P(2) = 2 kg,P(3) = 5kg and P(...

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  16. A plane surface, incline at 37^(@) to the horizontal is accelerated ho...

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  17. A weight of mass m=1 kg attached to a spring of force constant k = 20 ...

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  18. M(A) = 3 kg ,M(B) = 4 kg ,M(C) = 8 kg. Coefficient of friction between...

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  19. The total mass of an elevator with a 80 kg man in it is 1000 kg. This ...

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  20. Two masses 1.65 kg and 3.30 kg are joined together by a massles rod pa...

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  21. A body of mass m was slowly hauled up the hill as shown in the fig. by...

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