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# Same spring is attached with 2kg, 3kg and 1 kg blocks in three different cases as shown in figure. If and be the extensions in the spring in these three cases then

## The correct answer is:

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### If masses are released from the position shown in figure then time elapsed before mass m1 collides with the floor will be :

### If masses are released from the position shown in figure then time elapsed before mass m1 collides with the floor will be :

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### A block A of mass m is placed over a plank B of mass 2m. Plank B is placed over a smooth horizontal surface. The coefficient of friction between A and B is 0.5. Block A is given a velocity v_{0} towards right. Acceleration of B relative to A is

### A block A of mass m is placed over a plank B of mass 2m. Plank B is placed over a smooth horizontal surface. The coefficient of friction between A and B is 0.5. Block A is given a velocity v_{0} towards right. Acceleration of B relative to A is

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### In figure shown, both blocks are released from rest. The time to cross each other

### In figure shown, both blocks are released from rest. The time to cross each other

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### A block A is placed over a long rough plank B of same mass as shown in figure. The plank is placed over a smooth horizontal surface. At time t=0, block A is given a velocity v_{0} in horizontal direction. Let and be the velocities of A and B at time t. Then choose the correct graph between or and t

### A block A is placed over a long rough plank B of same mass as shown in figure. The plank is placed over a smooth horizontal surface. At time t=0, block A is given a velocity v_{0} in horizontal direction. Let and be the velocities of A and B at time t. Then choose the correct graph between or and t

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### Three blocks A , B and C of equal mass m are placed one over the other on a smooth horizontal ground as shown in figure. Coefficient of friction between any two blocks of A,B and C is The maximum value of mass of block D so that the blocks A, B and C move without slipping over each other is

### Three blocks A , B and C of equal mass m are placed one over the other on a smooth horizontal ground as shown in figure. Coefficient of friction between any two blocks of A,B and C is The maximum value of mass of block D so that the blocks A, B and C move without slipping over each other is

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### For the system shown in the figure, the acceleration of the mass m_{4} immediately after the lower thread x is cut will be, (assume that the threads are weightless and inextensible, the spring are weightless, the mass of pulley is negligible and there is no friction)

### For the system shown in the figure, the acceleration of the mass m_{4} immediately after the lower thread x is cut will be, (assume that the threads are weightless and inextensible, the spring are weightless, the mass of pulley is negligible and there is no friction)

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### Given . The coefficient of friction between A and B = 0.3, between B and C = 0.2 and between C, and ground, = 0.1. The least horizontal force F to start motion of any part of the system of three blocks resting upon one another as shown in figure is ( g = 10 )

### Given . The coefficient of friction between A and B = 0.3, between B and C = 0.2 and between C, and ground, = 0.1. The least horizontal force F to start motion of any part of the system of three blocks resting upon one another as shown in figure is ( g = 10 )

physics-General

maths-

maths-General

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### is equal to:

### is equal to:

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### If the chord through the points whose eccentric angles are and on the ellipse =1 passes through the focus (ae, 0), then the value of tan tan = 0 is –

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### For a certain mass of a gas Isothermal relation between ‘P’ and ‘V’ are shown by the graphs at two different temperatures T_{1} and T_{2} then

### For a certain mass of a gas Isothermal relation between ‘P’ and ‘V’ are shown by the graphs at two different temperatures T_{1} and T_{2} then

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### If the chord joining two points whose eccentric angles are and cuts the major axis of an ellipse + = 1 at a distance c from the centre, then tan . tan is equal to

### If the chord joining two points whose eccentric angles are and cuts the major axis of an ellipse + = 1 at a distance c from the centre, then tan . tan is equal to

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### P(a cos, b sin) is any point on the ellipse + = 1 Now if this ellipse is rotated anticlockwise by 90º and P reaches then co-ordinate of are -

### P(a cos, b sin) is any point on the ellipse + = 1 Now if this ellipse is rotated anticlockwise by 90º and P reaches then co-ordinate of are -

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### Normal to the ellipse intersects the major and minor axis at P and Q respectively then locus of the point dividing segment PQ in 2 : 1 is -

### Normal to the ellipse intersects the major and minor axis at P and Q respectively then locus of the point dividing segment PQ in 2 : 1 is -

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