Rankers Physics

Kinematics of Circular Motion: Practice Problem & Solution

A stone is moved round a horizontal circle with a 20 cm long string tied to If centripetal acceleration is 9.8 m/s2, then its angular velocity will be :
7 rad/s
22/7 rad/s
49 rad/s
14 rad/s

Solution Explained:

To solve this problem, we apply the core principles of Kinematics of Circular Motion. Understanding the underlying formula is key to arriving at the correct answer below:

Centripetal Acceleration is given by a= ω²R

⇒ 9.8 = ω²× 1/5

⇒ ω² =49

⇒ ω = 7 rad/sec

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