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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?

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?

Grade:11

2 Answers

Vikas TU
14149 Points
7 years ago
​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.
Nikhil Negi
28 Points
7 years ago
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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