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Assertion : Acceleration of a moving par...

Assertion : Acceleration of a moving particle can change its direction without any change in direction of velocity.
Reason : If the direction of change in velocity vector changes, the direction of acceleration vector also changes.

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
`a=(v_(f)-v_(i))/(Delta t) = (dv)/(dt)` i.e., direction of acceleration is same as that of change in velocity vector, or in the direction of `Delta v`.
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Knowledge Check

  • Statement I Acceleration of a moving particle can be changed without changing direction of velocity. Statement n If the direction of velocity changes, so the direction of acceleration also changes.

    A
    Statement I is true, Statement II Is true, Statement II Is the correct explanation for Statement I.
    B
    Statement I Is true, Statement II is true, Statement II Is not the correct explanation for Statement I.
    C
    Statement I Is true, Statement II Is false.
    D
    Statement I Is false, Statement II Is true.

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    A
    a DC motor
    B
    a DC motor and an AC generator
    C
    a DC motor and a DC generator
    D
    an AC generator

  • A commutator changes the direction of current in the coil of

    A
    a DC motor
    B
    a DC motor and an AC generator
    C
    a DC motor and a DC generator
    D
    an AC generator

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