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(A): The body falls freely, when acceler...

(A): The body falls freely, when acceleration of body is equal to acceleration due to gravity
(R): A body falling freely will have constant velocity

A

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

Both (A) and (R) are true and (R) is not the correct explanation of (A)

C

(A) is true but (R) is false

D

Both (A) and (R) are false

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-MOTION IN A STRAIGHT LINE-Exercise 2A
  1. (A): Acceleration is the rate of change of velecity. (R): A body hav...

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  2. (A) : A body can have acceleration even if its velocity is zero at a g...

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  3. (A): Velocity- time graph for an object in uniform motion along a stra...

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  4. (Assertion) :A body may be accelerated even when it is moving at unifo...

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  5. (A) : Average speed is equal to total distance travelled divided by lo...

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  6. (A): The average and instantaneous velocities have same value in a uni...

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  7. (A): The speedometer of an automobile measure the instantaneous speed ...

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  8. (A): A negative acceleration of a body is associated with a slowing do...

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  9. (A): A body thrown up from the top of a tower and another body thrown ...

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  10. (A): The body falls freely, when acceleration of body is equal to acce...

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  11. (A): Displacement of a body is the signed sum of the area under veloci...

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  12. (A): Two balls of different masses are thrown vertically upward with s...

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  13. (A): The Instantaneous velocity does not depend on instantaneous posit...

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  14. (A): A balloon ascends from the surface of earth with constant speed. ...

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  15. (A): Always |(d vecv)/(dt)|=(d)/(dt) |vecv|, where vecv has its usual ...

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  16. (A): A lift ascending with decreasing speed means acceleration of lift...

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  17. (A): The v-t graph perpendicular to time axis is not possible in pract...

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  18. (A): If vecr(1) and vecr(2) be the initial and final displacement in t...

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  19. (A): Body projected vertically up or down from the top of a tower with...

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  20. (A) The relative velocity between any two bodies moving in opposite di...

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