A stone of mass 4 Kg is attached to a string , its length 10 m .it moves in a horizontal circular path. The tension force of the string becomes 160 N then calculate its velocity.
The Attempt at a Solution
Its quite easy to solve when supposing the tension force = centripetal force while this is not given in the problem so how to solve it??
If tension = centripetal force
them 160 = m V^2/r
160= 4 * V^2 /10
then V = 20 m/s
so my problem that"it is not necessary for the tension force to be equal to the centripetal force" so could you help me??
thanks in advance