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There are many types of spring. Important among these are helical and spiral springs as shown in figure.(a) (b) Usually, we assume that the springs are massless. Therefore, work done is stored in the spring in the form of elastic potential energy of the spring. Thus, potential energy of a spring is the energy associated with the state of compression or expansion of an elastic spring.The potential energy of a spring increases by `15 J` when stretched by 3 cm. If it is stretched by 4 cm, the increase in potential energy

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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There are many types of spring. Important among these are helical and spiral springs as shown in figure.(a) (b) Usually, we assume that the springs are massless. Therefore, work done is stored in the spring in the form of elastic potential energy of the spring. Thus, potential energy of a spring is the energy associated with the state of compression or expansion of an elastic spring.The potential energy of a spring when stretched through a distance `x` is `10 J`. What is the amount of work done on the same spring to stretch it through an additional distance

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Principle of Conservation of EnergyTotal energy of an isolated system always remains constant. Since, the universe as a whole may be viewed as an isolated system, total energy of the universe is constant. If one part of the universe loses energy, then other part must gain an equal amount of energy. The principle of conservation of energy cannot be proved as such. However, no violation of this principle has been observed.When we rub two flint stones together, got them to heat up and to ignite a heap of dry leaves in the form

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Principle of Conservation of EnergyTotal energy of an isolated system always remains constant. Since, the universe as a whole may be viewed as an isolated system, total energy of the universe is constant. If one part of the universe loses energy, then other part must gain an equal amount of energy. The principle of conservation of energy cannot be proved as such. However, no violation of this principle has been observed.Which graph represents conservation of total mechanical

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Principle of Conservation of EnergyTotal energy of an isolated system always remains constant. Since, the universe as a whole may be viewed as an isolated system, total energy of the universe is constant. If one part of the universe loses energy, then other part must gain an equal amount of energy. The principle of conservation of energy cannot be proved as such. However, no violation of this principle has been observed.In the given curved road, if particle is released from A,

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Principle of Conservation of EnergyTotal energy of an isolated system always remains constant. Since, the universe as a whole may be viewed as an isolated system, total energy of the universe is constant. If one part of the universe loses energy, then other part must gain an equal amount of energy. The principle of conservation of energy cannot be proved as such. However, no violation of this principle has been observed.`U` is the potential energy, K is the kinetic energy and E is the mechanical energy. Which of the following is not possible for a stable

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Principle of Conservation of EnergyTotal energy of an isolated system always remains constant. Since, the universe as a whole may be viewed as an isolated system, total energy of the universe is constant. If one part of the universe loses energy, then other part must gain an equal amount of energy. The principle of conservation of energy cannot be proved as such. However, no violation of this principle has been observed.A body of mass 5 kg is thrown vertically up with a kinetic energy of `490J`. The height at which the kinetic energy of the body becomes half of the

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A system of particles is called a rigid body,

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The centre of mass of a system of particles does not depend

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In pure rotation, all particles of the

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For n particles in a space, the suitable expression for the `x`-coordinate of the centre of mass of a system

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Two bodies of masses `1 kg and 2 kg` are lying on `x-y` plane at `(1, 2) and (- 1, 3)` respectively. What are the coordinates of centre of

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Three identical spheres of mass M each are placed at the corners of an equilateral triangle of side 2 m. Taking one of the corner as the origin, the position vector of the centre of mass

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Centre of mass of the given system of particles will be

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Two particles of equal masses have velocities `v_1 = 4 hati ms^(-1) and v_2 = 4 hatj ms^(-1)` . First particle has an acceleration `a_1 = (2hati + 2hatj) ms^(-2)`, while the acceleration of the other particle is zero. The centre of mass of the two particles moves in a path

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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The centre of mass of three particles of masses `1 kg, 2 kg and 3 kg` is at `(3, 3, 3)` with reference to a fixed coordinate system. Where should a fourth particle of mass 4 kg be placed, so that the centre of mass of the system of all particles shifts to a point `(1, 1,

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A ball kept in a closed box moves in the box making collisions with the walls. The box is kept on a smooth surface. The velocity of the centre of

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A force `F` is applied on a single particle Pas shown in the figure. Here, `r` is the position vector of the particle. The value of torque `tau`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A force `F=5hati + 2hatj - 5hatk` acts on a particle whose position vector is `r =hati - 2hatj + hatk`. What is the torque about the origin

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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ABC is an equilateral triangle with `O` as its centre. `F_1, F_2 and F_3` represent three forces acting along the sides `AB, BC and AC,` respectively. If the total torque about `O` is zero, then the magnitude of `F_3`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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