Questions by varun

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

asked Mar 19, 2022 in 11th Physics

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If force is acting on a moving body perpendicular to the direction of motion, then what will be its effect on the speed and direction of the

asked Mar 19, 2022 in 11th Physics

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The two ends of spring – balance are pulled each by a force of 10kg.wt. What will be the reading of the

asked Mar 19, 2022 in 11th Physics

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A lift is accelerated upward. Will the apparent weight of a person inside the lift increase, decrease or remain the same relative to its real weight? If the lift is going with uniform speed,

asked Mar 19, 2022 in 11th Physics

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A soda water bottle is falling freely. Will the bubbles of the gas rise in the water of the

asked Mar 19, 2022 in 11th Physics

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Two billiard balls each of mass 0.05kg moving in opposite directions with speed 6m/s collide and rebound with the same speed. What is the impulse imparted to each ball due to

asked Mar 19, 2022 in 11th Physics

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A nucleus is at rest in the laboratory frame of reference. Show that if it disintegrates into two smaller nuclei, the products must be emitted in opposite

asked Mar 19, 2022 in 11th Physics

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Explain why passengers are thrown forward form their seats when a speeding bus stops

asked Mar 19, 2022 in 11th Physics

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A man weighs 70kg. He stands on a weighting machine in a lift, which is moving (a) Upwards with a uniform speed of 10m/s. (b) Downwards with a uniform acceleration of 5m/`s^2`. (c) Upwards with a uniform acceleration of 5m/`s^2`. Take g = 9.8m/`s^2`. What would be the readings on the scales in each case what would be the reading if the lift mechanism failed and it came down freely under

asked Mar 19, 2022 in 11th Physics

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(a) State impulse – momentum theorem?(b) A ball of mass 0.1kg is thrown against a wall. It strikes the wall normally with a velocity of 30m/s and rebounds with a velocity of 20m/s. calculate the impulse of the force exerted by the ball on the

asked Mar 19, 2022 in 11th Physics

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Ten one rupee coins are put on top of one another on a table. Each coin has a mass m kg. Give the magnitude and direction of (a) The force on the `7^(th)` coin (counted from the bottom) due to all coins above it. (b) The force on the `7^(th)` coin by the eighth coin and (c) The reaction of the sixth coin on the seventh

asked Mar 19, 2022 in 11th Physics

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A thief jumps from the roof of a house with a box of weight W on his head. What will be the weight of the box as experienced by the thief during

asked Mar 19, 2022 in 11th Physics

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Which of the following is scalar quantity? Inertia, force and linear

asked Mar 19, 2022 in 11th Physics

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Action and reaction forces do not balance each other.

asked Mar 19, 2022 in 11th Physics

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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

asked Mar 19, 2022 in 11th Physics

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

asked Mar 19, 2022 in 11th Physics

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How does banking of roads reduce wear and tear of the

asked Mar 19, 2022 in 11th Physics

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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

asked Mar 19, 2022 in 11th Physics

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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

asked Mar 19, 2022 in 11th Physics

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State and prove the principle of law of conservation of linear

asked Mar 19, 2022 in 11th Physics

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