• Support PF! Buy your school textbooks, materials and every day products Here!

Converting one part of the equation into another

  • Thread starter !!!
  • Start date
  • #1
!!!
11
0

Homework Statement


http://img90.imageshack.us/img90/8280/picture1mc2.png [Broken]
In my answer guide, how do I eliminate h from the beginning part of this equation? Can someone give me hints to fill in the missing gap?

Homework Equations


None

The Attempt at a Solution


I don't know how to get rid of h first. :(
 
Last edited by a moderator:

Answers and Replies

  • #2
91
0
Rearrange one of the expressions so that they are both expressions for h. Then equate them (or just put them together) and you will have eliminated h.
 
  • #3
!!!
11
0
I still don't know how to rearrange them D:
 
  • #4
HallsofIvy
Science Advisor
Homework Helper
41,794
925
If you have never learned algebra, you are going to have a very difficult time through out this course since it clearly assumes you did. The first equation, [itex]h= (1/2)gt^2[/itex] is already solved for h. You can just replace h in the second euation, [itex](2/3)h= (1/2)g(t- \Delta t)^2[/itex] by [itex](1/2)gt^2[/itex]. Or, doing as coffeem suggests, since h is multiplied by 2/3, you can multiply both sides by 3/2 to get rid of that 2/3.
 

Related Threads for: Converting one part of the equation into another

  • Last Post
Replies
18
Views
2K
  • Last Post
Replies
7
Views
2K
  • Last Post
Replies
3
Views
1K
Replies
4
Views
378
Replies
20
Views
557
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
1
Views
1K
Replies
2
Views
3K
Top