# Any help appreciated

#### Alexs45

A 0.25-kg ball attached to a string is rotating in a horizontal circle of radius 0.5 m. If the ball revolves twice every second, what is the tension in the string?

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#### Alexs45

Whyy

Why Wont Anoyboyd Help Me!

#### Yegor

T (tension)= m*(v^2)/R
And v (speed) You can find from frequency!?

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#### Alexs45

so do you just plug the numbers into that formula and if it revolves twice every second does that effect the problem.

#### Yegor

You should represent velocity throgh the frequency
Or You can find velocity through v=s/t

#### Alexs45

do you mind doing out the problem because i am confused.like a step by step example..thank you so much Yegor

#### dextercioby

Homework Helper
1.The tension in the rope/wire is a centripetal force.Which formula giving the centripetal force would be best to use in this case?

Daniel.

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