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A stick of mass m and length l is pivote...

A stick of mass m and length l is pivoted at one end and is displaced through an angle `theta.` The increase in potential energy is

A

`mg(l)/(2)(1-cos theta)`

B

`mg(l)/(2)(1+cos theta)`

C

`mg(l)/(2)(1-sin theta)`

D

`mg(l)/(2)(1+sin theta)`

Text Solution

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The correct Answer is:
A
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AAKASH INSTITUTE-WORK, ENERGY AND POWER-Assignment (SECTION - A)
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  2. Potential energy is defined

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  3. A stick of mass m and length l is pivoted at one end and is displaced ...

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  4. A spring with spring constant k when compressed by 1 cm the PE stored ...

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  5. Two springs have spring constants k(1)and k(2) (k(1)nek(2)). Both are ...

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  6. Initially mass m is held such that spring is in relaxed condition. If ...

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  7. A block of mass m moving with velocity v(0) on a smooth horizontal sur...

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  8. For a particle moving under the action of a variable force, kinetic en...

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  9. A particle of mass 1 kg is subjected to a force which varies with dist...

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  10. An unloaded bus can be stopped by applying brakies on straight road af...

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  11. The potential energy of a particle of mass 5 kg moving in the x-y plan...

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  12. The power of water pump is 4 kW. If g=10 ms^(-2), the amount of water ...

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  15. The blades of a windmill sweep out a circle of area A. If the wind flo...

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  16. A body of mass m, accelerates uniformly from rest to V(1) in time t(1)...

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  17. The power of a pump, which can pump 500 kg of water to height 100 m in...

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  18. A pump is used to pump a liquid of density rho continuously through a ...

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  19. A car of mass m has an engine which can deliver power P. The minimum t...

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  20. From a waterfall, water is falling down at the rate of 100kg / s on th...

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