Question

A small stone of mass 100 g in rotated in a vertical circle of radius 40 cm. What is the minimum speed needed at the lowest point for looping the loop? Also find the tension in the string at this point. (g = 10 ms^-2).

Correct answer! !​

Answer 1

Explanation:

minimum minimum speed needed at the lowest point is√5gr.

so the answer is√5*10*0.4=2√5m/s

tension is 6 mg

so the answer is 6N

Answer 2

$\bf\huge\green{\boxed{6\:N}}$