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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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How does banking of roads reduce wear and tear of the

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A monkey of mass 40 kg climbs on a rope which can stand a maximum tension 600 N. In which of the following cases will the rope break? The monkey (a) climbs up with an acceleration of 6m/`s^2` (b) climbs down with an acceleration of 4m/`s^2` (c) climbs up with a uniform seed of 5m/s (d) falls down the rope freely under gravity. Take g = 10m/`s^2` and ignore the mass of the

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What is meant by coefficient of friction and angel of friction? Establish the relation between the two? ORA block of mass 10kg is sliding on a surface inclined at a angle of `30^o` with the horizontal. Calculate the acceleration of the block. The coefficient of kinetic friction between the block and the surface is

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State and prove the principle of law of conservation of linear

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A particle of mass 0.40 kg moving initially with constant speed of 10m/s to the north is subject to a constant force of 8.0 N directed towards south for 30s. Take at that instant, the force is applied to be t = 0, and the position of the particle at that time to be x = 0, predict its position at `t = -5s, 25s,

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Why is it desired to hold a gun tight to one’s shoulder when it is being

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Why does a swimmer push the water

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Friction is a self adjusting force.

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A force is being applied on a body but it causes no acceleration. What possibilities may be considered to explain the

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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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An elevator weighs 3000kg. What is its acceleration when the in the tension supporting cable is 33000N. Given that g =

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Write two consequences of Newton’s second law of

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How is centripetal force provided in case of the following?(i) Motion of planet around the sun,(ii) Motion of moon around the earth.(iii) Motion of an electron around the nucleus in an

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State Newton’s second, law of motion. Express it mathematically and hence obtaina relation between force and

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A railway car of mass 20 tonnes moves with an initial speed of 54km/hr. On applying brakes, a constant negative acceleration of 0.3m/`s^2` is produced.(i) What is the breaking force acting on the car?(ii) In what time it will stop?(iii) What distance will be covered by the car before if finally

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What is the unit of coefficient of

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Name the factor on which coefficient of friction

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What provides the centripetal force to a car taking a turn on a level

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