Physics-
General
Easy
Question
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.
- Find the magnitude of the normal contact force exerted on each ring by the wire.
- Find, in terms of , the magnitude of the frictional force on each ring.
- Given that the coefficient of friction between each ring and the wire is 0.3, find the greatest possible value of q for the system to be in equilibrium.
- none of these
, the magnitude of the frictional force on each ring.
The correct answer is: Given that the coefficient of friction between each ring and the wire is 0.3, find the greatest possible value of q for the system to be in equilibrium.
Related Questions to study
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
physics-General
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.
physics-General
physics-
Slider block A move to the left with a constant velocity of 6 m/s. Determine
Slider block A move to the left with a constant velocity of 6 m/s. Determine
physics-General
physics-
An ideal monoatomic gas is carried around the cycle ABCDA as shown in the figure. The efficiency of the gas cycle is :
An ideal monoatomic gas is carried around the cycle ABCDA as shown in the figure. The efficiency of the gas cycle is :
physics-General
physics-
A body of mass m starts sliding down a movable inclined plane of mass 2m at t = 0, assuming friction is absent everywhere the kinetic energy of 2m as a function of time is (m remains on 2m) best represented by
A body of mass m starts sliding down a movable inclined plane of mass 2m at t = 0, assuming friction is absent everywhere the kinetic energy of 2m as a function of time is (m remains on 2m) best represented by
physics-General
physics-
In the figure shown, A & B are free to move. All the surfaces are smooth. 
In the figure shown, A & B are free to move. All the surfaces are smooth.
physics-General
physics-
The ends of two rods of different materials with their thermal conductivities, radii of cross sections and lengths all are in the ratio 1 : 2 are maintained at the same temperature difference. If the rate of flow of heat in the larger rod is 4 cal/sec, that in the shorter rod in cal/sec. will be
The ends of two rods of different materials with their thermal conductivities, radii of cross sections and lengths all are in the ratio 1 : 2 are maintained at the same temperature difference. If the rate of flow of heat in the larger rod is 4 cal/sec, that in the shorter rod in cal/sec. will be
physics-General
physics-
The diagram shows an equiconvex lens. What should be the condition on the refractive indices so that the lens become diverging?
The diagram shows an equiconvex lens. What should be the condition on the refractive indices so that the lens become diverging?
physics-General
