Physics-
General
Easy
Question
A particle moves in one dimensional field with total mechanical energy E. If potential energy of particle is 
, then
- Particle has zero speed where
- Particle has zero acceleration where
- Particle has zero velocity where
- Particle has zero acceleration where
The correct answer is: Particle has zero velocity where
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A body of mass m is slowly halved up the rough hill by a force 
at which each point is directed along a tangent to the hill. Work done by the force
A body of mass m is slowly halved up the rough hill by a force at which each point is directed along a tangent to the hill. Work done by the force
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Simple pendulum 
and 
have lengths 
= 80 cm and 
= 100 cm. The bob are of masses 
and 
. Initially both are at rest in equilibrium position. If each of the bobs is given a displacement of 2cm, the work done is 
respectively. Then,
Simple pendulum and have lengths = 80 cm and = 100 cm. The bob are of masses and . Initially both are at rest in equilibrium position. If each of the bobs is given a displacement of 2cm, the work done is respectively. Then,
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The upper half of an inclined plane with inclination q is perfectly smooth while the lower half is rough. A body starting from rest at the top will again come to rest at the bottom if the coefficient of friction for the lower half is given by
The upper half of an inclined plane with inclination q is perfectly smooth while the lower half is rough. A body starting from rest at the top will again come to rest at the bottom if the coefficient of friction for the lower half is given by
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A particle is projected along the inner surface of a smooth vertical circle of radius R, its velocity at the lowest point being 
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The potential energy for the force 
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The potential energy for the force if the zero of the potential energy is to be chosen at the point (2, 2, 2) is
physics-General
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Consider a roller coaster with a circular loop. A roller coaster car starts from rest from the top of a hill which is 5 m higher than the top of the loop. It rolls down the hill and through the loop. What must the radius of the loop be so that the passengers of the car will feel at highest point, as if they their normal weight ?
Consider a roller coaster with a circular loop. A roller coaster car starts from rest from the top of a hill which is 5 m higher than the top of the loop. It rolls down the hill and through the loop. What must the radius of the loop be so that the passengers of the car will feel at highest point, as if they their normal weight ?
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A pendulum bob of mass m is suspended at rest. A constant horizontal force 
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A pendulum bob of mass m is suspended at rest. A constant horizontal force starts acting on it. The maximum angular deflection of the string is
physics-General
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4 A car is moving along a hilly road as shown (side view). The coefficient of static friction between the tyres and pavement is constant and the car maintains a steady speed. If, at one of the points shown the driver applies the brakes as hard as possible without making the tires slip, the magnitude of the frictional force immediately after the brakes are applied will be maximum if the car was at
4 A car is moving along a hilly road as shown (side view). The coefficient of static friction between the tyres and pavement is constant and the car maintains a steady speed. If, at one of the points shown the driver applies the brakes as hard as possible without making the tires slip, the magnitude of the frictional force immediately after the brakes are applied will be maximum if the car was at
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One end of a light rope is tied directly to the ceiling. A man of mass M initially at rest on the ground starts climbing the rope hand over upto a height 
. From the time he starts at rest on the ground to the time he is hanging at rest at a height , how much work done on the man by the rope ?
One end of a light rope is tied directly to the ceiling. A man of mass M initially at rest on the ground starts climbing the rope hand over upto a height . From the time he starts at rest on the ground to the time he is hanging at rest at a height , how much work done on the man by the rope ?
physics-General
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A block of mass 1 kg is placed on a rough horizontal surface. A spring is attached to the block whose other end is joined to a rigid wall,as shown in the figure. A horizontal force is applied on the block so that it remains at rest while the spring is elongated by x.
Let 
be the maximum and minimum values of force F for which the block remains in equilibrium. For a particular x, = 2 N. Also shown is the variation of 
, the elongation of the spring The value of 
, if x = 3 cm is :
A block of mass 1 kg is placed on a rough horizontal surface. A spring is attached to the block whose other end is joined to a rigid wall,as shown in the figure. A horizontal force is applied on the block so that it remains at rest while the spring is elongated by x. Let be the maximum and minimum values of force F for which the block remains in equilibrium. For a particular x, = 2 N. Also shown is the variation of , the elongation of the spring The value of , if x = 3 cm is :
physics-General
physics-
A block of mass 1 kg is placed on a rough horizontal surface. A spring is attached to the block whose other end is joined to a rigid wall,as shown in the figure. A horizontal force is applied on the block so that it remains at rest while the spring is elongated by x. Let be the maximum and minimum values of force F for which the block remains in equilibrium. For a particular x, 
= 2 N. Also shown is the variation of 
, the elongation of the spring The spring constant of the spring is:
A block of mass 1 kg is placed on a rough horizontal surface. A spring is attached to the block whose other end is joined to a rigid wall,as shown in the figure. A horizontal force is applied on the block so that it remains at rest while the spring is elongated by x. Let be the maximum and minimum values of force F for which the block remains in equilibrium. For a particular x, = 2 N. Also shown is the variation of , the elongation of the spring The spring constant of the spring is:
physics-General
physics-
A block of mass 1 kg is placed on a rough horizontal surface. A spring is attached to the block whose other end is joined to a rigid wall,as shown in the figure. A horizontal force is applied on the block so that it remains at rest while the spring is elongated by x 
be the maximum and minimum values of force F for which the block remains in equilibrium. For a particular x, 
. Also shown is the variation of Fmax+ Fmin versus x, the elongation of the spring The coefficient of friction between the block and the horizontal surface is :
A block of mass 1 kg is placed on a rough horizontal surface. A spring is attached to the block whose other end is joined to a rigid wall,as shown in the figure. A horizontal force is applied on the block so that it remains at rest while the spring is elongated by x be the maximum and minimum values of force F for which the block remains in equilibrium. For a particular x, . Also shown is the variation of Fmax+ Fmin versus x, the elongation of the spring The coefficient of friction between the block and the horizontal surface is :
physics-General
physics-
Two bodies A and B of masses 10 kg and 5 kg are placed very slightly separated as shown in figure. The coefficients of friction between the floor and the blocks are as 
. Block A is pushed by an external force F. The value of F can be changed. When the welding between block A and ground breaks, block A will start pressing block B and when welding of B also breaks, block B will start pressing the vertical wall If F = 50 N, the friction force acting between block B and ground will be :
Two bodies A and B of masses 10 kg and 5 kg are placed very slightly separated as shown in figure. The coefficients of friction between the floor and the blocks are as . Block A is pushed by an external force F. The value of F can be changed. When the welding between block A and ground breaks, block A will start pressing block B and when welding of B also breaks, block B will start pressing the vertical wall If F = 50 N, the friction force acting between block B and ground will be :
physics-General
physics-
Two bodies A and B of masses 10 kg and 5 kg are placed very slightly separated as shown in figure. The coefficients of friction between the floor and the blocks are as . Block A is pushed by an external force F. The value of F can be changed. When the welding between block A and ground breaks, block A will start pressing block B and when welding of B also breaks, block B will start pressing the vertical wall 
If 
, with how much force does block A presses the block B
Two bodies A and B of masses 10 kg and 5 kg are placed very slightly separated as shown in figure. The coefficients of friction between the floor and the blocks are as . Block A is pushed by an external force F. The value of F can be changed. When the welding between block A and ground breaks, block A will start pressing block B and when welding of B also breaks, block B will start pressing the vertical wall If , with how much force does block A presses the block B
physics-General
physics-
STATEMENT-1 : A fixed wedge of inclination 
lies on horizontal table. x and y axes are drawn on inclined surface as shown, such that x axis is horizontal and y-axis is along line of greatest slope. A block of mass m is placed (at rest) on inclined surface at origin. The coefficient of friction between block and wedge is 
, such that 
. Then a force 
applied to block parallel to inclined surface and along x-axis can move the block along x-axis
STATEMENT-2 : To move the block placed at rest on rough inclined surface along the inclined surface, the net force on block (except frictional force) should be greater than 
. (N = normal reaction on block).
STATEMENT-1 : A fixed wedge of inclination lies on horizontal table. x and y axes are drawn on inclined surface as shown, such that x axis is horizontal and y-axis is along line of greatest slope. A block of mass m is placed (at rest) on inclined surface at origin. The coefficient of friction between block and wedge is , such that . Then a force applied to block parallel to inclined surface and along x-axis can move the block along x-axis
STATEMENT-2 : To move the block placed at rest on rough inclined surface along the inclined surface, the net force on block (except frictional force) should be greater than . (N = normal reaction on block).
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