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Assertion : An object may have varying s...

Assertion : An object may have varying speed without having varying velocity.
Reason : If the velocity is zero at an instant, the acceleration may not be zero at that instant.

A

If both Assertion and Reason are correct and Reason is the correct explanation of assertion.

B

If both Assertion and Reason are correct but Reason in not the correct explanation of Assertion.

C

If Assertion is true but Reason is false.

D

If Assertion is false but Reason is true.

Text Solution

Verified by Experts

The correct Answer is:
D
If speed varies, then velocity will definitely vary. When a particle is thrown upwards, at highest point
`a ne 0` but `upsilon = 0`.
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DC PANDEY-MOTION IN A PLANE-(B) Meical entrance special format questions (Assertion and reason)
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  2. Assertion : An object may have varying speed without having varying ve...

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  3. Assertion : Magnitude of average velocity is equal to average speed, i...

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  4. Assertion : In the equation, s=u+at-(1)/(2)a where, s is the distance ...

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  5. Assertion : A body is momentarily at rest at the instant it reverses t...

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  6. Assertion : The average velocity of a particle having initial and fina...

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  7. Assertion : The upsilon-t graph perpendicular to time axis is not poss...

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  8. Assertion : If velocity - time equation of a particle moving in a stra...

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  9. Assertion : Distance between two particles moving with consant veloci...

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  10. Assertion : In the s-t diagram as shown in figure, the body starts mov...

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  11. Assertion : In the s-t graph as shown in figure, velocity of particle ...

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  12. Assertion : A body of mass 4 kg has an initial velocity 5hat(i)ms^(-1)...

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  13. Assertion : Particle A is moving Eastwards and particle B Northwards w...

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  14. Assertion : On a curved path, average speed of a particle can never be...

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  15. Assertion : If a particle is thrown upwards, then distance travelled i...

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  16. Assertoin : If acceleration of a particle moving in a straight line va...

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  17. Assertion : A lift is ascending with decreasing speed means accelerati...

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  18. Assertion : A body is moving along a straight line such the its veloc...

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  19. Assertion : In the upsilon-t diagram as shown in figure, average veloc...

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