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Assertion: Stopping distance =`('Kinetic energy')/('Stopping force')`. Reason: Work done in stopping a body is equal to change in kinetic energy of the

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Assertion: Decrease in mechanical energy is more in case of an object sliding up a relatively less inclined plane due to friction.Reason: The coefficient of friction between the block and the surface decreases with the increase in the angle of

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Assertion: Quick collision between two bodies is more violent than a slow collision; even when the initial and final velocities are identical. Reason: The momentum is greater in first

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

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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,

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The centre of gravity of a homogeneous body is the point at which the

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A disc is rotating with angular velocity `omega`. A force `F` acts at a point whose position vector with respect to the axis of rotation is `r`. The power associated with torque due to the force is given

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

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Torque and Centre of GravityTorque is also known as moment of force or couple. When a force acts on a particle, the particle does not merely move in the direction of the force but it also turns about some point. So, we can define the torque for a particle about a point as the vector product of position vector of the point where the force acts and with the force itself. In the given figure, balancing of a cardboard on the tip of a pencil is done. The point of support, G is the centre of gravity.If the `F_(net.ext)`. is

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

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Torque and Centre of GravityTorque is also known as moment of force or couple. When a force acts on a particle, the particle does not merely move in the direction of the force but it also turns about some point. So, we can define the torque for a particle about a point as the vector product of position vector of the point where the force acts and with the force itself. In the given figure, balancing of a cardboard on the tip of a pencil is done. The point of support, G is the centre of gravity.Choose the correct

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

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The kinetic energy of the satellite in a circular orbit with speed `v` is given

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An astronaut experiences weightlessness in a space satellite. It is

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Weight of a body is maximum at

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The ratio of the magnitude of potential energy and kinetic energy of a satellite is

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If the gravitational attraction of earth suddenly disappears, then which of the following statement is

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Assertion: A satellite moves around the earth in a circular orbit under the action of gravity. A person in the satellite experience zero gravity field in the satellite. Reason: The contact force by the surface on the person is not

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What is periodic motion

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Every oscillaory motion is

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If string wires of same material of length l and 2l vibrate with frequencies 100HZ and 150 HZ. Find the ratio of their

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Differentiate between the types of vibration in closed and open organ

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Draw displacement time graph for uniformly accelerated motion. What is its

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

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