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A block of mass (m) slides along the tra...

A block of mass (m) slides along the track with kinetic friction mu. A man pulls the block through a rope which makes an angle `theta` with the horizontal as shown in the figure. The block moves with constant speed v. Power dlivered by man is
.

A

`Tv`

B

`Tv cos theta`

C

`(T cos theta-mumg)v`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
B
`P=F. v Fv cos theta=TV cos theta`
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DC PANDEY ENGLISH-WORK, ENERGY & POWER-Level 2 Objective
  1. A particle is projected at t=0 from a point on the ground with certain...

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  2. A block of mass m is attached to one end of a mass less spring of spri...

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  3. A block of mass (m) slides along the track with kinetic friction mu. A...

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  4. The potential energy phi in joule of a particle of mass 1 kg moving in...

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  5. The force acting on a body moving along x-axis variation of the partic...

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  6. A small mass slides down an inclined plane of inclination theta with t...

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  7. Two light vertical springs with equal natural length and spring consta...

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  8. A block of mass 1kg slides down a curved track which forms one quadran...

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  9. The potential energy function for a diatomic molecule is U(x) =(a)/(x^...

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  10. A rod mass (M) hinged at (O) is kept in equilibrium with a spring of s...

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  11. In the figure. (m2) (< m(1)) are joined together by a pulley. When the...

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  12. A particle free to move along x-axis is acted upon by a force F=-ax+b...

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  13. Equal net forces act on two different block (A) and (B) masses (m) and...

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  14. The potential energy function of a particle in the x-y plane is given ...

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  15. A vertical spring is fixed to one of its end and a massless plank plan...

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  16. A uniform chain of length of length pir lies inside a smooth semicircu...

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  17. A block of mass m is connected to a spring of force constant k. Initia...

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  18. Two blocks are connected to an ideal spring of stiffness 200 N//m. At ...

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  19. A block (A) of mass 45kg is placed on another block (B) of mass 123 kg...

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  20. A block of mass 10 kg is released on a fixed wedge inside a cart which...

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