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A 1 kg block is given a velocity of 15 m/s towards right over a very long rough plank of mass 2 kg as shown in figure. The correct graph showing linear momentum of 1 kg (i.e. p subscript 1 end subscript ) and of 2kg (i.e. p subscript 2 end subscript) versus time is

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The correct answer is:

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Two blocks of equal mass m are connected by an unstretched spring and the system is kept at rest on a frictionless horizontal surface. A constant force F is applied on the first block pulling it away from the other as shown in figure. If the extension of the spring is X subscript 0 end subscript at time t, then the displacement of the second block at this instant is :-

Two blocks of equal mass m are connected by an unstretched spring and the system is kept at rest on a frictionless horizontal surface. A constant force F is applied on the first block pulling it away from the other as shown in figure. If the extension of the spring is X subscript 0 end subscript at time t, then the displacement of the second block at this instant is :-

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Two blocks of equal mass m are connected by an Un stretched spring and the system is kept at rest on a frictionless horizontal surface. A constant force F is applied on the first block pulling it away from the other as shown in figure. If the extension of the spring is X subscript 0 end subscript at time t, then the displacement of the first block at this instant is :

Two blocks of equal mass m are connected by an Un stretched spring and the system is kept at rest on a frictionless horizontal surface. A constant force F is applied on the first block pulling it away from the other as shown in figure. If the extension of the spring is X subscript 0 end subscript at time t, then the displacement of the first block at this instant is :

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Two blocks of equal mass m are connected by an unstretched spring, and the system is kept at rest on a frictionless horizontal surface. A constant force F is applied on the first block pulling it away from the other as shown in figure Then the displacement of the centre of mass at time t is:-

Two blocks of equal mass m are connected by an unstretched spring, and the system is kept at rest on a frictionless horizontal surface. A constant force F is applied on the first block pulling it away from the other as shown in figure Then the displacement of the centre of mass at time t is:-

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An initially stationary box on a frictionless floor explodes into two pieces, piece A with mass m subscript A end subscript and piece B with mass m subscript B end subscript . Two pieces then move across the floor along x–axis. Graph of position versus time for the two pieces are given If all the graphs are possible then, in which of the following cases external force must be acting on the box :-

An initially stationary box on a frictionless floor explodes into two pieces, piece A with mass m subscript A end subscript and piece B with mass m subscript B end subscript . Two pieces then move across the floor along x–axis. Graph of position versus time for the two pieces are given If all the graphs are possible then, in which of the following cases external force must be acting on the box :-

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An initially stationary box on a frictionless floor explodes into two pieces, piece A with mass m subscript A end subscript and piece B with mass m subscript B end subscript . Two pieces then move across the floor along x–axis. Graph of position versus time for the two pieces are given. Which graphs pertain to physically possible explosions ?

An initially stationary box on a frictionless floor explodes into two pieces, piece A with mass m subscript A end subscript and piece B with mass m subscript B end subscript . Two pieces then move across the floor along x–axis. Graph of position versus time for the two pieces are given. Which graphs pertain to physically possible explosions ?

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When the mass of a system is variable, a thrust force has to be applied on it in addition to all other forces acting on it. This thrust force is given by stack F with rightwards arrow on top equals stack v with rightwards arrow on top subscript r end subscript open parentheses plus-or-minus fraction numerator d m over denominator d t end fraction close parentheses Here stack v with rightwards arrow on top subscript r end subscriptis the relative velocity with which the mass dm either enters or leaves the system. A car has total mass 50 kg. Gases are ejected from this backwards with relative velocity 20 m/s. The rate of ejection of gas is 2 kg/s. Total mass of gas is 20 kg. Coefficient of friction between the car and road is mu = 0.1 Car will stop after (from starting) t = .... seconds :

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When the mass of a system is variable, a thrust force has to be applied on it in addition to all other forces acting on it. This thrust force is given by stack F with rightwards arrow on top equals stack v with rightwards arrow on top subscript r end subscript open parentheses plus-or-minus fraction numerator d m over denominator d t end fraction close parentheses Here stack v with rightwards arrow on top subscript r end subscriptis the relative velocity with which the mass dm either enters or leaves the system. A car has total mass 50 kg. Gases are ejected from this backwards with relative velocity 20 m/s. The rate of ejection of gas is 2 kg/total mass of gas is 20 kg. Coefficient of friction between the car and road is mu = 0.1 Maximum speed of car will be v = ..... m/s text (Take  end text l text  n  end text fraction numerator 4 over denominator 3 end fraction equals 0.28 text  ) end text

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When the mass of a system is variable, a thrust force has to be applied on it in addition to all other forces acting on it. This thrust force is given by stack F with rightwards arrow on top equals stack v with rightwards arrow on top subscript r end subscript open parentheses plus-or-minus fraction numerator d m over denominator d t end fraction close parentheses Here stack v with rightwards arrow on top subscript r end subscriptis the relative velocity with which the mass d m either enters or leaves the system. A car has total mass 50 kg. Gases are ejected from this backwards with relative velocity 20 m/s. The rate of ejection of gas is 2 kg/total mass of gas is 20 kg. Coefficient of friction between the car and road is mu = 0.1 Car will start moving after time t = . .. second:

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If net force on a system in a particular direction is zero (say in horizontal direction) we can apply: sum m subscript R end subscript x subscript R end subscript equals sum m subscript L end subscript x subscript L end subscript comma sum m subscript R end subscript v subscript R end subscript equals sum m subscript L end subscript v subscript L end subscript text  and  end text sum m subscript R end subscript a subscript R end subscript equals sum m subscript L end subscript a subscript L end subscript Here R stands for the masses which are moving towards right and L for the masses towards left, x is displacement, v is velocity and a the acceleration (all with respect to ground). A small block of mass m = 1 kg is placed over a wedge of mass M = 4 kg as shown in figure. Mass m is released from rest. All surfaces are smooth. Origin O is as shown. At the same instant reaction on the wedge from the ground is N

If net force on a system in a particular direction is zero (say in horizontal direction) we can apply: sum m subscript R end subscript x subscript R end subscript equals sum m subscript L end subscript x subscript L end subscript comma sum m subscript R end subscript v subscript R end subscript equals sum m subscript L end subscript v subscript L end subscript text  and  end text sum m subscript R end subscript a subscript R end subscript equals sum m subscript L end subscript a subscript L end subscript Here R stands for the masses which are moving towards right and L for the masses towards left, x is displacement, v is velocity and a the acceleration (all with respect to ground). A small block of mass m = 1 kg is placed over a wedge of mass M = 4 kg as shown in figure. Mass m is released from rest. All surfaces are smooth. Origin O is as shown. At the same instant reaction on the wedge from the ground is N

physics-General
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If net force on a system in a particular direction is zero (say in horizontal direction) we can apply: sum m subscript R end subscript x subscript R end subscript equals sum m subscript L end subscript x subscript L end subscript comma sum m subscript R end subscript v subscript R end subscript equals sum m subscript L end subscript v subscript L end subscript text  and  end text sum m subscript R end subscript a subscript R end subscript equals sum m subscript L end subscript a subscript L end subscript Here R stands for the masses which are moving towards right and L for the masses towards left, x is displacement, v is velocity and a the acceleration (all with respect to ground). A small block of mass m = 1 kg is placed over a wedge of mass M = 4 kg as shown in figure. Mass m is released from rest. All surfaces are smooth. Origin O is as shown. Normal reaction between the two blocks at an instant when absolute acceleration of m is 5 square root of 3 m/s2 at 60° with horizontal is N. Normal reaction at this instant is making 30 to the power of ring operator end exponent with horizontal:

If net force on a system in a particular direction is zero (say in horizontal direction) we can apply: sum m subscript R end subscript x subscript R end subscript equals sum m subscript L end subscript x subscript L end subscript comma sum m subscript R end subscript v subscript R end subscript equals sum m subscript L end subscript v subscript L end subscript text  and  end text sum m subscript R end subscript a subscript R end subscript equals sum m subscript L end subscript a subscript L end subscript Here R stands for the masses which are moving towards right and L for the masses towards left, x is displacement, v is velocity and a the acceleration (all with respect to ground). A small block of mass m = 1 kg is placed over a wedge of mass M = 4 kg as shown in figure. Mass m is released from rest. All surfaces are smooth. Origin O is as shown. Normal reaction between the two blocks at an instant when absolute acceleration of m is 5 square root of 3 m/s2 at 60° with horizontal is N. Normal reaction at this instant is making 30 to the power of ring operator end exponent with horizontal:

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