when a speed of a body is constant it's acceleration must be zero. true or false
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Explanation:
Speed is the magnitude of velocity and the magnitude of non-zero velocity cannot be zero. (c) True. When a particle moves with a constant speed in the same direction, neither the magnitude nor the direction of velocity changes and so acceleration is zero.
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Answer:
no its not true in the case of uniform circular motion. In this motion speed is constant as its a scalar quantity and doesnt depend on direction. however acceleration depends on velocity which is a vector quantity and changes with direction. since velocity changes theres an acceleration produced and hence it cant be zero.
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