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Question

A particle is decelerating while moving on a circular path clockwise as shown in the figure. When it is at point A, the direction of its net acceleration is best represented as


A
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B
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C
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D
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Solution

The correct option is D
Speed of particle at position A is decreasing, hence its tangential acceleration must be in a direction opposite to its velocity.

Since, particle moving in clockwise direction, so direction of velocity at point A will be in upward direction and tangential acceleration will be in downward.


Here, centripetal and tangential acceleration are acting as shown in figure.

So, the direction of net acceleration is represented by ar

Hence, option (d) is correct.

Why this question?Tip: A particle undergoing circularmotion will move with increasing speedif tangential acceleration is in the samedirection as the velocity at each point.

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