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If `W_1, W_2 and W_3` are the work done in moving a particle from A and B along three different paths 1, 2 and 3 respectively (as shown) in the gravitational field of a point mass `m`, the relation between `W_1, W_2 and W_3`

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The kinetic energy of a body of mass `4 kg` and momentum `6 N-s` will

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An object of mass m moves horizontally, increasing in speed from `0` to `v` in a time `t`. The power necessary to accelerate the object during this time period

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Newton’s second law for rotational motion of a system of particle can be represented as (L for a system of

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A rod is rotating about an axis passing through its centre and perpendicular to its length.The radius of gyration for the rod

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A wheel of radius `R` rolls on the ground with a uniform velocity `v`. The velocity of topmost point relative to the bottommost point

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Assertion: The centre of mass of a body must lie on the body. Reason: The centre of mass of a body does not lie at the geometric centre of

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An artificial satellite is revolving around the earth, close to its surface. Find the orbital velocity of artificial satellite? (Take, radius of earth = 6400

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What is

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Under what condition is the relation `s =υt`

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A car moving on a straight highway with speed of 126km/hr. is brought to Two balls of differevelocitystop within a distance of 200m. What is the retardation of the car (assumed uniform) and how long does it take for the car to

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Define (i) `v = u + at` (ii) `V^2 – u^2 = 2as` by calculus

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What is the value of angular speed for 1

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What is the angle of projection at which horizontal range and maximum height are

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Give an example of a body moving with uniform speed but having a variable velocity and an acceleration which remains constant in magnitude but changes in

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A stone tied at the end of string is whirled in a circle. If the string breaks, the stone flies away tangentially.

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At what point of projectile motion (i) potential energy maximum (ii) Kinetic energymaximum (iii) total mechanical energy is

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A bird is sitting on the floor of a wire cage and the cage is in the hand of a boy. The bird starts flying in the cage. Will the boy experience any change in the weight of the

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Why does a cyclist lean to one side, while going along curve? In what direction does he

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Force of 16N and 12N are acting on a mass of 200kg in mutually perpendicular directions. Find the magnitude of the acceleration

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