A body is revolving with a constant speed along a circular path. Which of the following statements are true regarding that body?

Its acceleration is directed along the axis of revolution

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If the direction of velocity is reversed, the centripetal force does not change in magnitude and direction

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If the direction of velocity is reversed, the centripetal force does not change in magnitude but its direction changes

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Its velocity changes due to change of direction

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Solution

The correct options are
B If the direction of velocity is reversed, the centripetal force does not change in magnitude and direction
D Its velocity changes due to change of direction
A body is revolving with a constant speed along a circular path then its acceleration is directed along the radius of the circle. Also If the direction of velocity is reversed, the centripetal force does not change in magnitude and direction. And Its velocity changes due to change of direction

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Which of the following is true about multiplication of a vector by a scalar.

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2) Scalar multiplication always lead to change in magnitude and direction.

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4) Scalar multiplication by a negative number other than -1 will reverse its direction and change its magnitude as well.

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