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Centripetal force...

Centripetal force

A

Inertial frame

B

non-inertial frame

C

both (a) and (b)

D

linear motion

Text Solution

Verified by Experts

The correct Answer is:
C
inertial frame and non inertial frame
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Read the following paragraph carefully and answer the following: Tie a stone to one end of a string. Take the other end in your hand and rotate the string so that the stone moves along a circle. As long as we are holding the string, we are pulling the stone towards us i.e. towards the centre of the circle and are appliying a force towards it. The force stops acting on it if we release the string. In this case, the stone will fly off along a straight line which is the tangent to the circle at the position of the stone when the string is released, because that the directionn of its velocity at that instant of time. You may recall a similar activity in which a 5 rupee coin kept on a rotating circular disc flies off the disc along the tangent to the disc. Thus, a force acts on any object moving along a circle and it is directed towards the centre of the circle. This is called the Centripetal force. The impressed force on the same is in which direction?

Read the following paragraph carefully and answer the following: Tie a stone to one end of a string. Take the other end in your hand and rotate the string so that the stone moves along a circle. As long as we are holding the string, we are pulling the stone towards us i.e. towards the centre of the circle and are appliying a force towards it. The force stops acting on it if we release the string. In this case, the stone will fly off along a straight line which is the tangent to the circle at the position of the stone when the string is released, because that the directionn of its velocity at that instant of time. You may recall a similar activity in which a 5 rupee coin kept on a rotating circular disc flies off the disc along the tangent to the disc. Thus, a force acts on any object moving along a circle and it is directed towards the centre of the circle. This is called the Centripetal force. What happens if the string is released?

In the following question, a statement of Assertion is followed by a statement of Reason. Assertion: When a body moves along a circular path, the work done by a centripetal force is zero. Reason: The centripetal force is utilised in moving the body along the circular path and hence the work is done. Choose one of the following statements is correct?

Two satellite A and B of the same mass are revolving around the Earth in circular orbits such that the distance of B from the centre of the Earth is thrice as compared to the distance of A from the centre. What will be the ratio of centripetal force on B to that on A.

In the Bohr model of a hydrogen atom, the centripetal force is furnished by the coulomb attraction between the proton and the electron. If a_0 , is the radius of the ground state orbit, m is the mass, e is the charge on the electron and epsilon_0 is the vacuum permittivity, the speed of the electron is

In the Bohr model of hydrogen atom, the electron is treated as a particle going in a circle with the centre at the proton. The proton itself is assumed to be fixed in an inertial frame. The centripetal force is provided by the Coloumb attraction. In the ground state, the electron goes round the proton in a circle of radius 5.3xx10^-11m . Find the speed of the electron in the ground state. Mass of the electron =9.1xx10^-31 kg and charge of the electron = 1.6xx10^-19C .

Centripetal acceleration is given by

FULL MARKS-LAW OF MOTION -ADDITIONAL QUESTIONS SOLVED (MULTIPLE CHOICE QUESTIONS)
  1. When a car is moving on a circular track the centripetal force is due ...

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  2. If the road is horizontal then the normal force and gravitational forc...

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  3. The velocity of a car for safe turn on leveled circular road

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  4. In a leveled circular road, skidding mainly depends on

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  5. The speed of a car to move on the banked road so that it will have saf...

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  6. Centrifugal force is a

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  7. Centrifugal force is a

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  8. Centripetal force

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  9. Centrifugal force acts in

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  10. A cricket ball of mass 100 g moving with a speed of 20 ms^(-1) is bro...

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  11. If a stone tied at the one end of a string of length 0.5 m is whirled ...

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  12. A block of mass 3 kg is at rest on a rough inclined plane with angle o...

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  13. Two masses 2 kg and 4 kg are tied at the ends of a massless string and...

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  14. A bomb of 10 kg at rest explodes into two pieces of mass 4 kg and 6 kg...

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  15. A body is subjected under three concurrent forces and it is in equilib...

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  16. An impulse is applied to a moving object with the force at an angle of...

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  17. A bullet of mass m and velocity v1 is fired into a large block of woo...

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  18. A block of mass 2 kg is placed on the floor. The co-efficient of stati...

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  19. A truck weighing 1000 kg is moving with velocity of 50 km/h on smooth ...

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  20. A body of mass 100 g is sliding from an inclined plane of inclination ...

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