Question 286: Work, Energy and Power & Circular Motion

Question

A body attached to one end of a string performs motion along a vertical circle. Its centripetal acceleration, when the string is horizontal, will be [$$\mathrm{g}=$$ acceleration due to gravity]

Accepted Answer

When string is horizontal its speed is given by
$$V=\sqrt{3 \mathrm{gr}}$$
Centripetal acceleration $$=\frac{\mathrm{V}^2}{\mathrm{r}}=3 \mathrm{~g}$$

Answer

zero

Answer

5g

Answer

3g

Answer

g

Work, Energy and Power & Circular Motion

A body attached to one end of a string performs motion along a vertical circle. Its centripetal acceleration, when the string is horizontal, will be [$\mathrm{g}=$ acceleration due to gravity]

Choose the correct answer: