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Easy
Question
A single wire ACB passes through a smooth ring at C which revolves at a constant speed in the horizontal circle of radius r as shown in the fig. The speed of revolution is
The correct answer is:
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physics-
A body is thrown with a velocity of 10 m/s at an angle of 45° to the horizontal. The radius of curvature of its trajectory in 
sec after the body began to move is :
A body is thrown with a velocity of 10 m/s at an angle of 45° to the horizontal. The radius of curvature of its trajectory in sec after the body began to move is :
physics-General
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Two identical blocks of weight W are placed one on top of the other shown in figure. The upper block is tied to the wall. The coefficient of static friction between B and ground is 
and friction between A and B is absent when F = mw force is applied on the lower block as shown. The tension in the string will be
Two identical blocks of weight W are placed one on top of the other shown in figure. The upper block is tied to the wall. The coefficient of static friction between B and ground is and friction between A and B is absent when F = mw force is applied on the lower block as shown. The tension in the string will be
physics-General
physics-
Block A is placed on cart B as shown id figure. If the coefficients of static and kinetic friction between the 20 kg block A and 100 kg cart B are both essentially the same value of 0.5 
Block A is placed on cart B as shown id figure. If the coefficients of static and kinetic friction between the 20 kg block A and 100 kg cart B are both essentially the same value of 0.5
physics-General
physics-
For the two blocks initially at rest under constant ext. forces of mass1 kg and 2kg shown, 
Which of the following is correct?
For the two blocks initially at rest under constant ext. forces of mass1 kg and 2kg shown, Which of the following is correct?
physics-General
physics-
Three blocks lie on each other as shown. Horizontal force F (variable) is applied on block A. Choose the correct statements. 
Three blocks lie on each other as shown. Horizontal force F (variable) is applied on block A. Choose the correct statements.
physics-General
physics-
A smooth bead B of mass 0.6 kg is threaded on a light inextensible string whose ends are attached to two identical rings, each of mass 0.4 kg. The rings can move on a fixed straight horizontal wire. The system rests in equilibrium with each section of the string making an angle 
with the vertical, as shown in the diagram.
A smooth bead B of mass 0.6 kg is threaded on a light inextensible string whose ends are attached to two identical rings, each of mass 0.4 kg. The rings can move on a fixed straight horizontal wire. The system rests in equilibrium with each section of the string making an angle with the vertical, as shown in the diagram.
physics-General
physics-
On a particle moving on a circular path with a constant speed v, light is thrown from a projectors placed at the centre of the circular path. The shadow of the particle is formed on the wall. the velocity of shadow up the wall is
On a particle moving on a circular path with a constant speed v, light is thrown from a projectors placed at the centre of the circular path. The shadow of the particle is formed on the wall. the velocity of shadow up the wall is
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physics-
In the figure shown, the minimum force F to be applied perpendicular to the incline so that the block does not slide is
In the figure shown, the minimum force F to be applied perpendicular to the incline so that the block does not slide is
physics-General
physics-
Two blocks B1 & B2 of masses m1 & m2 respectively are connected with the help of a pulley and string as shown. Upper surface of vehicle is smooth but vertical surface is rough. 
do not slide, then minimum coefficient of friction between block 
and side of vehicle is:
Two blocks B1 & B2 of masses m1 & m2 respectively are connected with the help of a pulley and string as shown. Upper surface of vehicle is smooth but vertical surface is rough. do not slide, then minimum coefficient of friction between block and side of vehicle is:
physics-General
physics-
A mountain climber is sliding down a vertical rope. Her total mass including the equipments is 65 kg. By adjusting the friction on the rope, she controls the tension force on the rope as a function of time is shown in the fig. The speed of the mountaineer at the end of 2 sec if she starts from rest is 
A mountain climber is sliding down a vertical rope. Her total mass including the equipments is 65 kg. By adjusting the friction on the rope, she controls the tension force on the rope as a function of time is shown in the fig. The speed of the mountaineer at the end of 2 sec if she starts from rest is
physics-General
physics-
The minimum value of mass m required to lift the load M shown in figure is
The minimum value of mass m required to lift the load M shown in figure is
physics-General
physics-
One end of a light inextensible string is attached to a ceiling. The string passes under a smooth light pulley carrying a weight C and then over a fixed smooth light pulley. To the free end of the string is attached a light scale pan in which two weights A and B are placed with A on top of B as shown. The portions of the string not in contact with the pulleys are vertical. Each of the weights A and B has a mass M and the weight C has a mass 5M. If the system is released from rest
One end of a light inextensible string is attached to a ceiling. The string passes under a smooth light pulley carrying a weight C and then over a fixed smooth light pulley. To the free end of the string is attached a light scale pan in which two weights A and B are placed with A on top of B as shown. The portions of the string not in contact with the pulleys are vertical. Each of the weights A and B has a mass M and the weight C has a mass 5M. If the system is released from rest
physics-General
physics-
A heavy spherical ball is constrained in a frame as in figure. The inclined surface is smooth. The maximum acceleration with which the frame can move without causing the ball to leave the frame:
A heavy spherical ball is constrained in a frame as in figure. The inclined surface is smooth. The maximum acceleration with which the frame can move without causing the ball to leave the frame:
physics-General
physics-
A string is wrapped round a log of wood and it is pulled with a force F as shown in the figure Choose the correct statement(s)
I Tension T in the string decreases with increase in q
A string is wrapped round a log of wood and it is pulled with a force F as shown in the figure Choose the correct statement(s)
I Tension T in the string decreases with increase in q
physics-General
physics-
A child is swinging a ball of mass M around on a light spring which has spring constant k. The ball describes a horizontal circle a distance h above the floor. The stretched spring has a length l and makes an angle q with the vertical as shown below. The acceleration due to gravity is g. Neglect air resistance.
A child is swinging a ball of mass M around on a light spring which has spring constant k. The ball describes a horizontal circle a distance h above the floor. The stretched spring has a length l and makes an angle q with the vertical as shown below. The acceleration due to gravity is g. Neglect air resistance.
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