MHT CET 2021 Physics Solved Paper

(b) For half revolution, the position of the particle is given below,
Let velocity be v.
Change in velocity =v2−v1⇒v(−v)=2v
Time taken by the particle to cover half revolution
∴=‌

πR

v

∴ Average acceleration =‌

‌ Velocity ‌

‌ Time ‌

=‌

2v

πR v

=‌

2v2

πR