Gamma Question Bank for Medical Physics>Chapter 5 - Laws of Motion>Assignment>Q 37

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A cubical block rests on a plane of $μ = \sqrt{3} .$ The angle through which the plane be inclined to the horizontal so that the block just slides down will be

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Important Questions on Laws of Motion

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Gamma Question Bank for Medical Physics>Chapter 5 - Laws of Motion>Assignment>Q 38

A block of mass $1 kg$ is projected from the lowest point up along the inclined plane. If $g = 10 {ms}^{- 2},$ the retardation experienced by the block is

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Gamma Question Bank for Medical Physics>Chapter 5 - Laws of Motion>Assignment>Q 39

A child weighing

25 kg

slides down a rope hanging from a branch of a tall tree. If the force of friction acting against him is

200 N,

the acceleration of child is

(g = 10 m s^{- 2}) .

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Gamma Question Bank for Medical Physics>Chapter 5 - Laws of Motion>Assignment>Q 40

An object of mass

1 kg

moving on a horizontal surface with initial velocity

8 m s^{- 1}

comes to rest after

10 s .

If one wants to keep the object moving on the same surface with velocity

8 m s^{- 1}

the force required is

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Gamma Question Bank for Medical Physics>Chapter 5 - Laws of Motion>Assignment>Q 41

A heavy box is slid across a rough floor with an initial speed of

4 m s^{- 1} .

It stops moving after

8

seconds. If the average resisting force of friction is

10 N,

the mass of the box (in

kg

) is

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Gamma Question Bank for Medical Physics>Chapter 5 - Laws of Motion>Assignment>Q 42

If a block moving up an inclined plane at

30 °

with a velocity of

5 m s^{- 1},

stops after

0.5 s,

then coefficient of friction will be nearly

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Gamma Question Bank for Medical Physics>Chapter 5 - Laws of Motion>Assignment>Q 43

A metallic chain

1 m

long lies on a horizontal surface of a table. The chain starts sliding on the table if

25 cm

(or more of it) hangs over the edge of a table. The correct value of the coefficient of friction between the table and the chain is

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Gamma Question Bank for Medical Physics>Chapter 5 - Laws of Motion>Assignment>Q 44

A block of mass

m

placed on an inclined plane of angle of inclination

θ

slides down the plane with constant speed. The coefficient of kinetic friction between block and inclined plane is

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Gamma Question Bank for Medical Physics>Chapter 5 - Laws of Motion>Assignment>Q 45

In the figure shown, the coefficient of static friction between the block $A$ of mass $20 kg$ and horizontal table is $0.2 .$ What should be the minimum mass of hanging block just beyond which blocks start moving?

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