NCERT Exercise 2.7 - Motion in a Straight Line
Question: State with reasons if true or false � a particle in one-dimensional motion: (a) with zero speed at an instant may have non-zero acceleration (b) with zero speed may have non-zero velocity (c) with constant speed must have zero acceleration (d) with positive value of acceleration must be speeding up.
Answer: (a) **True**, (b) **False**, (c) **True**, (d) **False**.
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