Physics
General
Easy
Question
Three equal masses of mkg each are plced the vertices of an equilateral triangle PQR and a mass of 2 m kg is placed at the centroid 0 of the triangle which is at a distance of 
m from each of vertices of triangle. The force in newton. acting on the mass 2 m is …….
- 2
- 1
- zero
The correct answer is: zero
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As shown in figure, a block A having mass M is attached to one end of a massless spring. The block is on a frictionless horizontal surface and the free end of the spring is attached to a wall. Another block B having mass ' 
' is placed on top of blockA. Now on displacing this system horizontally and released, it executes S.H.M. What should be the maximum amplitude of oscillation so that B does not slide off A? Coefficient of static friction between the surfaces of the block's is 
.
As shown in figure, a block A having mass M is attached to one end of a massless spring. The block is on a frictionless horizontal surface and the free end of the spring is attached to a wall. Another block B having mass ' ' is placed on top of blockA. Now on displacing this system horizontally and released, it executes S.H.M. What should be the maximum amplitude of oscillation so that B does not slide off A? Coefficient of static friction between the surfaces of the block's is .
physics-General
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The displacement of a particle is given by 
Which of the following graph represents variation in potential energy as a fimction of tims 
and displacement 
.
The displacement of a particle is given by Which of the following graph represents variation in potential energy as a fimction of tims and displacement .
physics-General
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Two blocks 
and 
are attached to the two ends of a spring having leagth 
and force consiant 
on a horizontal surface. Initially the systen is in equilhium. Now a third block having same mass , moving with velocity 
collides with block A. Ln this situation........
Two blocks and are attached to the two ends of a spring having leagth and force consiant on a horizontal surface. Initially the systen is in equilhium. Now a third block having same mass , moving with velocity collides with block A. Ln this situation........
physics-General
physics
One can easily " Weight the earth " by calculating the mass of earth using the formula. (in usual notation)
One can easily " Weight the earth " by calculating the mass of earth using the formula. (in usual notation)
physicsGeneral
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Two identical springs are attached at the opposite ends of a rod having length 
and mass . The rod could rotate about its mid-point O as shown in figure. Now, if the point of the rod is pressed slightly and released, the rod starts executing oscillatory motion. The periodic time of this motion is………
Two identical springs are attached at the opposite ends of a rod having length and mass . The rod could rotate about its mid-point O as shown in figure. Now, if the point of the rod is pressed slightly and released, the rod starts executing oscillatory motion. The periodic time of this motion is………
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As shown in figure (A) and (B) , a body of mass is attached at the ends of the spring system, All springs have the same spring constaut k. Now when both systems oscillates along vertical diroction, the ratio of their periodic time is…….
As shown in figure (A) and (B) , a body of mass is attached at the ends of the spring system, All springs have the same spring constaut k. Now when both systems oscillates along vertical diroction, the ratio of their periodic time is…….
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A mass on an inclined smooth surface is attached to two springs as shown in figure. The other ends of both springs are attached to rigid surface. If the force constant of both spring is , then the periodic time of oscillation for the system is .
A mass on an inclined smooth surface is attached to two springs as shown in figure. The other ends of both springs are attached to rigid surface. If the force constant of both spring is , then the periodic time of oscillation for the system is .
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The distance of the moon and earth is D the mass of earth is 81 times the mass of moon. At what distance from the center of the earth, the gravitational force will be zero
The distance of the moon and earth is D the mass of earth is 81 times the mass of moon. At what distance from the center of the earth, the gravitational force will be zero
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Two particle of equal mass go round a circle of radius r. Under the action of their mutual gravitational force. The speed of each particle is …….
Two particle of equal mass go round a circle of radius r. Under the action of their mutual gravitational force. The speed of each particle is …….
physicsGeneral
biology
Match the column
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Match the column
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biologyGeneral
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The earth (mass=
kg) revolves around the sun with angular velocity 
rad/sec sec in a circular orbit of radius 1.5
km. The force exerted by the sun on the earth is...N
The earth (mass=kg) revolves around the sun with angular velocity rad/sec sec in a circular orbit of radius 1.5km. The force exerted by the sun on the earth is...N
physicsGeneral
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The figure shows elliptical orbit of a planet about the sun 
. the shaded area SCD is twice, the saded area SAB. If 
is the time tor the planet to move trom 
' and 
and 
is the time to move from A to B then
The figure shows elliptical orbit of a planet about the sun . the shaded area SCD is twice, the saded area SAB. If is the time tor the planet to move trom ' and and is the time to move from A to B then
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correct form of gravitational law is
correct form of gravitational law is
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A satellite of the earth is revolving in a circular orbit with a uniform speed v. If the gravitational force suddennly disappears, the satellite will
A satellite of the earth is revolving in a circular orbit with a uniform speed v. If the gravitational force suddennly disappears, the satellite will
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