Question of solved question

Wave Motion of Class 11

Question
A coil of chain of mass m per unit length lies on a horizontal table, to one end of the chain is attached a light string which passes over a smooth peg vertically above the chain carries at its free and a mass 2m. The system is released from rest when both parts of the spring are vertical and chain is on the point of rising from the table. Assuming that peg is high enough and that M does not reach table for what fraction of length of chain the system will next come to rest (instantaneously).

Frequently Asked Questions

Maximum value of static friction is called

A: Limiting friction

B: Rolling friction

C: Normal reaction

D: Coefficient of friction

Solution:

Explanation:

Limiting friction is the maximum value of the static friction. When a body overcomes the limiting friction, the body starts moving.

Final Answer:

Hence, option A is correct.

A running man has half the kinetic energy of that of a boy of half of his mass

The man speeds up by 1m/s , so that he has the same kinetic energy as that of the boy. The original speed of the man is?

kinetic energy1

Solution:

kinetic energy2

Two particles are projected simultaneously in the same

vertical plane, from the same point, both with different speeds and at different angles horizontally. The path followed by one, as seen by the other, is

A: a vertical line

B: a parabola

C: a hyperbola

D: a straight line making a constant angle ( ≠ 90 ^∘ ) with horizontal

 

 

Solution:

Explanation:-

simultaneously

which is a constant. So the path followed by one, as seen by the other, is a straight line, making a constant angle with the horizontal.

Final answer:-

Hence, the correct option is (D).

 

Give two examples of the following Random motion

 

 

Solution:

Explanation:-

If an object in motion has no particular direction and its motion shifts unexpectedly, then it is said to have random motion.

Final answer:-

The two examples of random motion are:

Motion of a football player.

Movement of a mosquito.

During an adiabatic process the pressure of a gas

is proportional to the cube of its adiabatic temperature.The value of  Cp/Cv for that gas is :

A:4/3

B:2

C:5/3

D:3/2

Solution:

Explanation:-

adiabatic1

Final answer:-

Hence, the correct option is (D).

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