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System shown in figure is released from rest. Pulley and spring is massless and friction is absent everywhere. The speed of 5 kg block when 2 kg block leaves the contact with ground is (Take force constant of spring 
The correct answer is:
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A smooth track in the form of a quarter circle of radius 6 m lies in the vertical plane. A particle moves from 
under the action of forces 
is always toward 
and is always 20 N in magnitude. Force 
always acts horizontally and is always 30 N in magnitude. Force 
always acts tangentially to the track and is of magnitude 15 N. Select the correct alternative(s)
A smooth track in the form of a quarter circle of radius 6 m lies in the vertical plane. A particle moves from under the action of forces is always toward and is always 20 N in magnitude. Force always acts horizontally and is always 30 N in magnitude. Force always acts tangentially to the track and is of magnitude 15 N. Select the correct alternative(s)
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Ball I is thrown towards a tower at an angle of 60° with the horizontal with unknown speed (u). At the same moment ball II is released from the top of tower as shown. Balls collide after two seconds and at the moment of collision, velocity of ball I is horizontal. Find
Ball I is thrown towards a tower at an angle of 60° with the horizontal with unknown speed (u). At the same moment ball II is released from the top of tower as shown. Balls collide after two seconds and at the moment of collision, velocity of ball I is horizontal. Find
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A ball of mass ‘m’ is rotating in a circle of radius ‘r’ with speed v inside a smooth cone as shown in figure. Let N be the normal reaction on the ball by the cone, then choose the wrong option.
A ball of mass ‘m’ is rotating in a circle of radius ‘r’ with speed v inside a smooth cone as shown in figure. Let N be the normal reaction on the ball by the cone, then choose the wrong option.
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System shown in the figure is released from rest when spring is unstretched. Pulley and spring is massless and friction is absent everywhere. The speed of 5 kg block when 2 kg block leaves the contact with ground is (Take force constant of spring k = 40 N/m and 
System shown in the figure is released from rest when spring is unstretched. Pulley and spring is massless and friction is absent everywhere. The speed of 5 kg block when 2 kg block leaves the contact with ground is (Take force constant of spring k = 40 N/m and
physics-General
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Two blocks of masses 
are connected by a non - deformed light spring. They are lying on a rough horizontal surface. The coefficient of friction between the blocks and the surface is 0.4. What minimum constant force F has to be applied in horizontal direction to the block of mass m1 in order to shift the other block? 
Two blocks of masses are connected by a non - deformed light spring. They are lying on a rough horizontal surface. The coefficient of friction between the blocks and the surface is 0.4. What minimum constant force F has to be applied in horizontal direction to the block of mass m1 in order to shift the other block?
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In the figure shown the spring constant is K. The mass of the upper disc is m and that of the lower disc is 3m. The upper block is depressed down from its equilibrium position by a distance 
=5mg/K and released at t=0. Find the velocity of ‘m’ when normal reaction on 3m is mg
In the figure shown the spring constant is K. The mass of the upper disc is m and that of the lower disc is 3m. The upper block is depressed down from its equilibrium position by a distance =5mg/K and released at t=0. Find the velocity of ‘m’ when normal reaction on 3m is mg
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A block of mass 'm' is released from rest at point A. The compression in spring, when the speed of block is maximum
A block of mass 'm' is released from rest at point A. The compression in spring, when the speed of block is maximum
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A uniform rod of length l and mass m is allowed to rotate in a horizontal plane about a vertical axis OO¢ passing through one of its ends with an angular velocity 
. Then the tension in the rod in terms of distance x measured from the axis of rotation is:
A uniform rod of length l and mass m is allowed to rotate in a horizontal plane about a vertical axis OO¢ passing through one of its ends with an angular velocity . Then the tension in the rod in terms of distance x measured from the axis of rotation is:
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A particle P of mass m is attached to a vertical axis by two strings AP and BP of length l each. The separation AB=l. P rotates around the axis with an angular velocity . The tensions in the two strings are 
A particle P of mass m is attached to a vertical axis by two strings AP and BP of length l each. The separation AB=l. P rotates around the axis with an angular velocity . The tensions in the two strings are
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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
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
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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 :
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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
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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
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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?
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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.
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