Question

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class9 physic ch motion​

Answer 1

Answer:

Q1. 2r

Q2. velocity

Q3. Uniform acceleration.

Answer 2

1. A particle is moving in a circular path of radius r.The displacement after half a circle would be 2r.
2. Rate of change of displacement is called velocity .
3. If the displacement of an object is proportional to square of time ,then the object moves with uniform acceleration.

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