Question

In which of the following situations does the centripetal force not exist?

• A. Moon revolving around the earth
• B. Playing on merry go round
• C. Turning the bicycle while riding
• D. Riding cycle in straight line

Answer 1

The correct option is D Riding cycle in straight line

When we follow the straight path the radius of that path will be taken as infinite, so the centripetal force becomes zero as it is inversely proportional to the radius of the path: Centripetal Force $=\frac{v^2}{R}$
V = velocity
R = radius
And as R is taken to be infinite, the force will go to ‘0’.