# Search results for query: *

1. ### Quantum Mechanics (Basic) Problem

So in part a, you seem to have a "g" floating around. It looks like you assumed the final potential energy is gravitational. The final potential energy should be for electric charges, neglect gravity.
2. ### Acceleration Help?

So a general way to go about kinematics problems: - Note that in all of the equations only 5 variables appear: t, \Delta x, v, v_o, a - These represent time, displacement, final velocity, initial velocity and acceleration. - Each individual equation only contains 4 variables. - Generally you...
3. ### Acceleration Help?

Kinematic equations are listed here. http://www.physicsclassroom.com/class/1dkin/u1l6b.cfm Its like the 2nd hit on google when you search for it.
4. ### Acceleration Help?

So the equation you listed, V^2 = V_o^2 +2a \Delta x Has 4 variables, none of which are time. I suggest you look at the kinematic equations and select the one with all of the variables you have and need to solve for. So the variables you already know (or can deduce) are what? (ie...
5. ### Simultaneous Equations From Kirchhoff's Rules

You should just have to move all the terms with I3 to one side of the equation and factor out the current. That should give you an answer for I3.
6. ### Spring Stretching Problem

Looks good. Didn't check numbers. Glad I could help. Good luck on your future physics endeavors.
7. ### Spring Stretching Problem

So the spring is hanging. Its not accelerating. Its just dangling there. So sum of forces is zero. Try that.
8. ### Magnitude of force of friction

I'm assuming its not something silly, like using grams instead of kilograms or having your calculator in radian mode as opposed to degree mode, correct?
9. ### Magnitude of force of friction

Ah. The force of static friction varies. The coefficient of static friction is used when you want the MAXIMUM value of static friction, ie just before the object starts to move. As an example: If a block on an incline had a normal force of say 10N and the coefficient of static friction was...
10. ### Magnitude of force of friction

Hint: If the coin is moving, should you be using the static coefficient or the kinetic coefficient.