Physics-
General
Easy
Question
A ball moving with a velocity 
strikes a wall moving towards the ball with a velocity 
as shown in fig. An elastic impact occurs. Consider the mass of the wall to be infinitely great. The work done by the wall during collision is
The correct answer is:
Initial K.E 
; Final K.E = 
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Six identical balls are lined in a straight groove made on a horizontal frictionless surface as shown. Two similar balls each moving with a velocity v collide elastically with the row of 6 balls from left. What will happen
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Physics-General
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A body of mass 2 kg slides down a curved track which is quadrant of a circle of radius 1 metre. All the surfaces are frictionless. If the body starts from rest, its speed at the bottom of the track is
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The relationship between the force F and position x of a body is as shown in figure. The work done in displacing the body from x = 1 m to x = 5 m will be
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Physics-General
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A particle of mass m moving with a velocity u makes an elastic one dimensional collision with a stationary particle of mass m establishing a contact with it for extremely small time T. Their force of contact increases from zero to F0 linearly in time 
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Physics-General
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The force required to stretch a spring varies with the distance as shown in the figure. If the experiment is performed with the above spring of half length, the line OA will
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Physics-General
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Figure shows the F-x graph. Where F is the force applied and x is the distance covered
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Physics-General
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The force acting on the particle is zero at
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The force acting on the particle is zero at
Physics-General
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The force acting on a body moving along x-axis varies with the position of the particle as shown in the fig.
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The body is in stable equilibrium at
Physics-General
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The potential energy of a system is represented in the first figure. the force acting on the system will be represented by
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Physics-General
Physics-
A force 
acting on an object varies with distance 
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Physics-General
Physics-
The adjoining diagram shows the velocity versus time plot for a particle. The work done by the force on the particle is positive from
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Physics-General
Physics-
The relation between the displacement X of an object produced by the application of the variable force F is represented by a graph shown in the figure. If the object undergoes a displacement from 
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Physics-General
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A particle of mass 0.1 kg is subjected to a force which varies with distance as shown in fig. If it starts its journey from rest at , its velocity at 
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Physics-General
Maths-
Consider the circuit,
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Maths-General
Chemistry-
0.45 gm of acid (MW = 90) was exactly neutralised by 20 ml. of 0.5 N NaOH. Basicity of the acid is
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Chemistry-General
