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Help needed with rearranging an equation

  • Thread starter Hussman
  • Start date
  • #1
9
0
Im having trouble rearranging an equation to find a value for I.



[The given equation is mgh = 1/2*Iw^2 + 1/2*mv^2 + Tf * theta


My attempt was a bit of a stab in the dark as i am useless with rearranging equations.

I = mgh/w^2 + 1/2*mv^2 + Tf * theta


Many thanks
 

Answers and Replies

  • #2
993
13
To make I subject of the equation is like peeling an onion.

First step: Transfer those two terms on the RHS not involving I to the LHS.
 
  • #3
9
0
ok so you end up with

mgh - 1/2*mv^2 - Tf*theta = 1/2*Iw^2

Would the lhs be divided by 1/2 w^2?

Thanks
 
Last edited:
  • #4
993
13
Yes we 'peel the next layer of the onion' by dividing BOTH sides by [itex]\frac{\omega^{2}}{2}[/itex] to isolate the I by itself on the RHS.
 
  • #5
9
0
Nice one cheers
 

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