- Identify when Fc or ac is occurring.
- Create a proper FBD
- Develop an equation that is the sum of the Forces
- Solve for specified quantities
"When Pigs Fly"
Use only the forces to calculate the above?
Use the Motion of the object to verify?
Problems & PSS for forces
Draw FBD
Identify Forces
Choose FOR
Break problem into smaller pieces by object or direction or both
write equations from FBD.
See These Examples
(Follow the directions at the top of the page) or open link on iOS livescribe app
On the calendar it says we have a test on twitter tonight. Are we still doing this??
ReplyDeleteEmma
We do not have to take the test. I talked to him today about it.
DeleteSydnee
My group has not gathered any quantities yet. How do you want us to answer these questions? Or are they more of a guideline for tomorrow's class?
ReplyDeleteI was attempting to do question 43, however I am confused on how the forces relate. Friction and gravity appear to be working vertically, while P and some normal force appear to be working horizontally. So, how do P and friction go together? I'm still a little confused when it comes to friction
ReplyDeleteFor the quest are we using the equation 4(pi)^2r^3/G(period)^2? If so, what does this equation apply to?
ReplyDeleteI'm thinking that this equation, like others, could be useful but not exactly necessary. It all depends on the given situation. For example, we had applied it when finding the mass of the galaxy. We had determined (when finding the mass of the sun) that in our particular circumstance FG=Fc. By cancelling out the masses and the radii, we had ended up with the eqauation G*m2/r=v^2. When this equation was rewritten in terms of mass, it gave us the equation m=v^2*r/G. Because we had the change in postion and the time, but not the exact velocity, we converted this to m=(2(pi)*r/period)^2/G. After some simplifying, we finally ended up with your equation which =m. So basically, this equation could possibly be used if finding the mass of something going in a circle in the universe, however it's important for you to understand what you need before you randomly select this equation.
DeletePs. Sorry if this explanation was long or contained more information than you needed, I just wanted to make sure I gave a decent reasoning of how and why this equation is used just in case it does appear on the quest.
I agree with Lizzie. This equation is useful under certain circumstances, but really not necessary. If you learn the basic four equations for Fg, Fc, FG, and F than you have the ability to solve any problem. Just combine equations and eliminate certain variables to solve for a certain aspect of the problem.
Delete-Emily F.