Physics-
General
Easy

Question

The value of v0 for which the block has zero velocity when spring is in its natural position is

  1. g square root of fraction numerator m over denominator K end fraction end root    
  2. 2 g square root of fraction numerator m over denominator K end fraction end root    
  3. g square root of fraction numerator m over denominator 2 K end fraction end root    
  4. 4 g square root of fraction numerator m over denominator K end fraction end root    

The correct answer is: g square root of fraction numerator m over denominator K end fraction end root

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PQ is a smooth inclined plane whose angle of inclination theta can be varied in such a way that point Q remains fixed & P can move on a vertical line PR. A particle slides from rest from point P. At different values of thetatime for descent td from P to Q is noted. The following statement is true about td:

PQ is a smooth inclined plane whose angle of inclination theta can be varied in such a way that point Q remains fixed & P can move on a vertical line PR. A particle slides from rest from point P. At different values of thetatime for descent td from P to Q is noted. The following statement is true about td:

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In figure, find the minimum value mass m of the rod so that the block of mass M = 20 kg remains stationary on the inclined plane. Assume friction as absent between m & M, also between m and the supports

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A hollow copper sphere & a hollow copper cube , of same surface area & negligible thickness, are filled with warm water of same temperature and placed in an enclosure of constant temperature, a few degrees below that of the bodies. Then in the beginning

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Figure, shows roughly how the force F between two adjacent atoms in a solid varies with separation r. Which statements are correct?

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2] Hooke's law is obeyed around P
3] The potential energy of the atoms is the gradient of the graph at all points
4] The energy to separate the atoms completely is obtained from the area enclosed below the axis of r

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