Question
Physics Question on laws of motion
A 2kg stone tied at the end of a string 1m long is whirled along a vertical circle at a constant speed of 4ms−1 . The tension in the string has a value of 52N when the stone is
A
At the top of the circle
B
Half way down
C
At the bottom of the circle
D
Half way up
Answer
At the bottom of the circle
Explanation
Solution
Here, m=2kg,r=1m,v=4ms−1 Tension at the bottom of the circle, TL=mg+rmv2 =20+12×42=52N