How to find the tangential velocity of an object

ebaines · Feb 24, 2010, 02:47 PM

Combine two concepts:

1. F = ma
2. For objects in circular motion with constant tangential velocity:
A = v^2/R

So:

F = ma = mv^2/R for objects in circular motion with constant tangential velocity

You now have everyting you need to deermine the value of v.

MS_SUMTER2010 · Feb 24, 2010, 02:56 PM

So it will be this:

4=v sqaured/ 2
Then I get 2.8.

But when I plug it back in the equation v^2/r.. I get 3.9

Unknown008 · Feb 25, 2010, 02:10 AM

You didn't read ebaines post well. You combine F=ma and a = v^2/r.

Then you get:

$F = \frac{mv^2}{r}$

From there, you 'll get your answer as 3.1 m/s^2 (2 sf)

MS_SUMTER2010 · Feb 25, 2010, 04:51 AM

Ok but what is the v squared part? Kuz it doesn't really say. I know the mass and the radius I just don't know how to get the velocity

ebaines · Feb 25, 2010, 06:11 AM

Starting with the formula we gave you:

$ F = \frac {m v^2} r $

Raarrange to get $v^2$ by itself:

$ V^2 = \frac {F r} m $

And take the square root of both sides:

$ V = \sqrt { \frac {Fr} m} $

You have valius for $F, \ are$ and $m$ , so you can solve for $v$ . Your answer will in units of meters/sec (NOT meters per second squared, as you had in your original post)

IWishICouldFly · Aug 23, 2010, 02:59 PM

Quote:

Originally Posted by ebaines

Starting with the formula we gave you:

$ F = \frac {m v^2} r $

Raarrange to get $v^2$ by itself:

$ V^2 = \frac {F r} m $

And take the square root of both sides:

$ V = \sqrt { \frac {Fr} m} $

You have valius for $F, \ are$ and $m$ , so you can solve for $v$ . Your answer will in units of meters/sec (NOT meters per second squared, as you had in your original post)

Thank you so much I was looking for this

How to find the tangential velocity of an object

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