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If a particle is moving in a straight line with constant speed then its acceleration. a)must be zero b)may be variable c) may be uniform d)both b and c What is the answer and how to interpret this question?
First option suitable as speed is constant the ccln must be zero.As accln. = chnge in velocity.And hence here both initial and final velocoty are same as both are constants therfore the difference would be zero,.and accln would be zero.
Acceleration= dv/dt It is given that v is constant (it is a straight line motion with constant speed =>speed = velocity)Differentiation of a constant is zero..Hence,acceleration=0
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