Recent questions tagged chapter5

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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 by varun (6.7k points)

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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 by varun (6.7k points)

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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 by varun (6.7k points)

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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 by varun (6.7k points)

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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 by varun (6.7k points)

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

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Action and reaction forces do not balance each other.

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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 by varun (6.7k points)

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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 by varun (6.7k points)

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How does banking of roads reduce wear and tear of the

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

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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 by varun (6.7k points)

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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 by varun (6.7k points)

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State and prove the principle of law of conservation of linear

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

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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 by varun (6.7k points)

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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.

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

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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

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

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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 by varun (6.7k points)

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