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Question

The position of a particle at any instant t is given by x equals acos omega t. The speed-time graph of the particle is

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The correct answer is:


    therefore blank x equals acos omega t
    therefore v equals fraction numerator d x over denominator d t end fraction equals negative a omega sin invisible function application omega t
    The instantaneous speed is given by modulus of instantaneous velocity.
    therefore blankspeedequals open vertical bar u close vertical bar equals open vertical bar negative a omega sin invisible function application omega t close vertical bar
    Hence, [c] is correct.

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