NCERT Exemplar Class 11
A raindrop falling from a height h above ground, attains a near terminal velocity when it has fallen through a height (3/4)h. Which of the diagrams shown in figure correctly shows the change in kinetic and potential energy of the drop during its fall up to the ground ?
09
Nov
A raindrop falling from a height h above ground, attains a near terminal velocity when it has fallen through a height (3/4)h. Which of the diagrams shown in figure correctly shows the change in kinetic and potential energy of the drop during its fall up to the ground ? A raindrop falling from a height [...]
A mass of 5 kg is moving along a circular path of radius 1 m. If the mass moves with 300 revolutions per minute, its kinetic energy would be
09
Nov
A mass of 5 kg is moving along a circular path of radius 1 m. If the mass moves with 300 revolutions per minute, its kinetic energy would be A mass of 5 kg is moving along a circular path of radius 1 m. If the mass moves with 300 revolutions per minute its kinetic [...]
Which of the diagrams shown in figure. Most closely shows the variation in kinetic energy of the earth as it moves once around the sun in its elliptical orbit ?
09
Nov
Which of the diagrams shown in figure. Most closely shows the variation in kinetic energy of the earth as it moves once around the sun in its elliptical orbit ? Which of the diagrams shown in figure. Most closely shows the variation in kinetic energy of the earth as it moves once around the sun [...]
A body is moving unidirectionally under the influence of a source of constant power supplying energy. Which of the diagrams shown in figure. Correctly shows the displacement-time curve for its motion ?
09
Nov
A body is moving unidirectionally under the influence of a source of constant power supplying energy. Which of the diagrams shown in figure. Correctly shows the displacement-time curve for its motion ? one gradual and the other steep meet at A from where two stones are allowed to slide down from rest one on each [...]
A particle of mass 0.5kg travels in a straight line with velocity v=ax^3/2 where a=5m^−1/2s^−1. What is the work done by the net force during its displacement from x=0 to x=2m?
09
Nov
A particle of mass 0.5kg travels in a straight line with velocity v=ax^3/2 where a=5m^−1/2s^−1. What is the work done by the net force during its displacement from x=0 to x=2m? A particle of mass 0.5kg travels in a straight line with velocity v=ax^3/2 where a=5m^−1/2s^−1. What is the work done by the net force [...]
Two identical ball bearings in contact with each other and resting on a frictionless table are hit heat-on by another ball bearing of the same mass moving initially with a speed V as shown in figure. If the collision is elastic, which of the following (figure) is a possible result after collision ?
09
Nov
Two identical ball bearings in contact with each other and resting on a frictionless table are hit heat-on by another ball bearing of the same mass moving initially with a speed V as shown in figure. If the collision is elastic, which of the following (figure) is a possible result after collision ? one gradual [...]
The potential energy function for a particle executing linear SHM is given by V(x)= 2/1 kx^2 where k is the force constant of the oscillator. For k=0.5 Nm^−1, the graph of V(x) versus x is shown in the figure. A particle of total energy E turns back when it reaches x=±x m . If V and K indicate the potential energy and kinetic energy, respectively of the particle at x = +x m, then which of the following is correct?
09
Nov
The potential energy function for a particle executing linear SHM is given by V(x)= 2/1 kx^2 where k is the force constant of the oscillator. For k=0.5 Nm^−1, the graph of V(x) versus x is shown in the figure. A particle of total energy E turns back when it reaches x=±x m . [...]
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respectively of the particle at x = +x m ,
the graph of V(x) versus x is shown in the figure. A particle of total energy E turns back when it reaches x=±x m . If V and K indicate the potential energy and kinetic energy ,
The potential energy function for a particle executing linear SHM is given by V(x)= 2/1 kx^2 where k is the force constant of the oscillator. For k=0.5 Nm^−1 ,
then which of the following is correct? ,
Two inclined frictionless tracks, one gradual and the other steep meet at A from where two stones are allowed to slide down from rest, one on each tracks as shown in figure. Which of the following statements is correct?
09
Nov
Two inclined frictionless tracks, one gradual and the other steep meet at A from where two stones are allowed to slide down from rest, one on each tracks as shown in figure. Which of the following statements is correct? one gradual and the other steep meet at A from where two stones are allowed to [...]
A block of mass M is held against a rough vertical wall by pressing it with a finger. If the coefficient of friction between the block and the wall is μ and the acceleration due to gravity is g, Calculate the minimum force required to be applied by the finger to hold the block against the wall?
09
Nov
A block of mass M is held against a rough vertical wall by pressing it with a finger. If the coefficient of friction between the block and the wall is μ and the acceleration due to gravity is g, Calculate the minimum force required to be applied by the finger to hold the block against [...]
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A block of mass M is held against a rough vertical wall by pressing it with a finger. If the coefficient of friction between the block and the wall is μ and the acceleration due to gravity is g ,
Calculate the minimum force required to be applied by the finger to hold the block against the wall? ,
A mass of 2kg is suspended with thread AB (figure) Thread CD of the same type is attached to the other end of 2 kg mass. Lower thread is pulled gradually, harder and harder in the downward gradually, harder and harder in the downward direction so as to apply force on AB. which of the threads will break and why?
09
Nov
A mass of 2kg is suspended with thread AB (figure) Thread CD of the same type is attached to the other end of 2 kg mass. Lower thread is pulled gradually, harder and harder in the downward gradually, harder and harder in the downward direction so as to apply force on AB. which of the [...]
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A mass of 2kg is suspended with thread AB (figure) Thread CD of the same type is attached to the other end of 2 kg mass. Lower thread is pulled gradually ,
harder and harder in the downward direction so as to apply force on AB. which of the threads will break and why? ,
harder and harder in the downward gradually ,