Questions by varun

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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,

asked Mar 19, 2022 in 11th Physics

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

asked Mar 19, 2022 in 11th Physics

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Why does a swimmer push the water

asked Mar 19, 2022 in 11th Physics

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Friction is a self adjusting force.

asked Mar 19, 2022 in 11th Physics

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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

asked Mar 19, 2022 in 11th Physics

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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

asked Mar 19, 2022 in 11th Physics

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

asked Mar 19, 2022 in 11th Physics

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Write two consequences of Newton’s second law of

asked Mar 19, 2022 in 11th Physics

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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

asked Mar 19, 2022 in 11th Physics

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

asked Mar 19, 2022 in 11th Physics

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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

asked Mar 19, 2022 in 11th Physics

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What is the unit of coefficient of

asked Mar 19, 2022 in 11th Physics

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Name the factor on which coefficient of friction

asked Mar 19, 2022 in 11th Physics

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

asked Mar 19, 2022 in 11th Physics

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Give the magnitude and direction of the net force acting on(a) A drop of rain falling down with constant speed.(b) A kite skillfully held stationary in the

asked Mar 19, 2022 in 11th Physics

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Two blocks of masses `m_1, m_2` are connected by light spring on a smooth horizontal surface. The two masses are pulled apart and then released. Prove that the ratio of their acceleration is inversely proportional to their

asked Mar 19, 2022 in 11th Physics

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A shell of mass 0.020kg is fired by a gun of mass 100kg. If the muzzle speed of the shell is 80m/s, what is the recoil speed of the

asked Mar 19, 2022 in 11th Physics

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A train runs along an unbanked circular bend of radius 30m at a speed of 54km/hr. The mass of the train is 106kg. What provides the necessary centripetal force required for this purpose? The engine or the rails? What is the angle of banking required to prevent wearing out of the

asked Mar 19, 2022 in 11th Physics

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Three identical blocks each having a mass m, are pushed by a force F on a frictionless table as shown in figure. What is the acceleration of the blocks? What is the net force on the block P? What force does P apply on Q. What force does Q apply on

asked Mar 19, 2022 in 11th Physics

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(a) Define impulse. State its S.I. unit? (b) State and prove impulse momentum

asked Mar 19, 2022 in 11th Physics

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