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The body moves under the action of const...

The body moves under the action of constant force along a straight line. The instantaneous power developed by this force with time 't' is correctly represented by:

A

B

C

D

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The correct Answer is:
B
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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 is centripetal force?

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?

Study of moving bodies under the action of forces _______

PREMIERS PUBLISHERS-WORK, ENERGY AND POWER -MULTIPLE CHOICE QUESTIONS (OTHER IMPORTANT QUESTIONS & ANSWERS)
  1. Match the parameters given in column I with the expressions given in c...

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  2. A body of mass 1kg begins to more under the action of a time dependent...

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  3. The body moves under the action of constant force along a straight lin...

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  4. Which one of the following statement is an incorrect statement?

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  5. The spring of the watch when wound possesses………………..energy.

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  6. A light and heavy body have equal momentum, which has greater K.E?

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  7. A light body and a heavy body have the same kinetic energy. Which one ...

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  8. Same retarding force is applied to stop the train in certain distance....

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  9. Law of conservation of linear momentum is applicable even in those ca...

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  10. In the following question, a statement of Assertion is followed by a s...

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  11. If the force and the displacement are in the same direction, then the ...

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  12. If the force and the displacement are at an angle of 180^(@), then wor...

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  13. Which one of the following statements is incorrect?

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  14. When a body does some work, we can say that work done by the body is

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  15. A body is said to be doing a negative work if :

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  16. Consider the following two statements. (A) Linear momentum of a syst...

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  17. From the following statements select the incorrect statements.

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  18. If a stone is released from a tower, then its total energy during its ...

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  19. Two springs have their force constants k(1) and k(2) (k(2) gt k(1)) . ...

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  20. Which of the following statements is wrong?

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