Physics Derivation URGENT!!

posted by .

Can someone please show me how to derive this...I am going crazy I have tried everyhthing that I can think of with this equation..even the Range Equation and that doesnt work! So please! I am dying and aahaha! How does this work in terms of mass and L? I think L has to be radius though, and you use something to do with centripetal force? HELP

a= gtan?

  • Physics Derivation URGENT!! -

    that should be a= gtan? (theta, not ?)

  • Physics Derivation URGENT!! -

    What is the physical situation that this formula is supposed to apply to? What is theta? One can't derive a formula of this type without knowing the problem

  • Physics Derivation URGENT!! -

    Thats my thoughts exaclty! It is this rubber stopper of mass m is in a car and then when the car accelerates it makes an angle with the veritcal which is theta. We are supposed to find a=gtantheta in terms of mass and L, which must be radius, cause the rubber stopper (which is on a string on a rear view mirror) is spinning, so something to do with centripetal motion...this is all I can gather...please try and help me with this, I know its a lot to ask, but Im drowning with this, its the only question I cant even begin to guess!

  • Physics Derivation URGENT!! -

    Forget about the rubber stopper spinning and that it has a radius. Just treat it as a mass at the end of a string. The string exerts a tension force T on the stopper. When the car accelerates, the string deviates from a vertical line by an agle theta. Write down the force balance on the stopper.

    T cos theta = m a
    T sin theta = m g

    Divide the first equation by the second:

    (sin theta)/(cos theta) = tan theta
    = a/g

    Note that the mass cancels out.

  • Physics Derivation URGENT!! -

    I get it, but I think it needs to be T cos theta=mg and T sin theta =ma and then when you divide you divide Tsintheta=ma/T cos theta=mg

    which leaves u with Sintetha=a/Cos theta=g

    so Tantheta=a/g and then rearrange to get a=gtantheta... so thanks! a lot! This makes sense now!

  • Physics Derivation URGENT!! -

    You are right; I got my sines and cosines mixed up, and then I mixed up the equaitons to cancel out my mistake. I was in too big a hurry. Nice work catching my error(s)!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    I have 2 can someone please read my question posted around noon today called Lab for physics?
  2. Algebra

    I've been trying to figure out this equation for over an hour but all the answers I get are wrong. The equation is 0.9=-10I^2+6I . The answer is supposed to be 0.3 and it does work out, but I have tried all different ways to solve …
  3. Derivation of Physics Equation

    How do we derive these laws: (most of the time, the numbers are subscript) v'2 = v1 * ( (2 * m) / (m1 + m2) ) + v2 * ( (m2-m1) / (m1+m2) ) & v'1 = v1 * ( (m1-m2) / (m1+m2) ) + v2 * ( (2 * m2) / (m1 + m2) )
  4. Precalculus(URGENT)

    determoine whether the equation defines y as a function of x y= the square root of(-3x-6) please please show work

    find an equation of the linear function f using the given information. please show all steps and work f(-1)=1, f(1)= -2
  6. Physics, error derivation

    I need to derive an error equation for Bohr's model to use in my physics lab this week. I am really bad at calculus, so if anyone can help me that would be really great. the equation is (1/lambda)=R[(1/n^2final)-(1/n^2initial)] I've …
  7. physics, error calculation repost

    I need to derive an error equation for Bohr's model to use in my physics lab this week. I am really bad at calculus, so if anyone can help me that would be really great. the equation is (1/lambda)=R[(1/n^2final)-(1/n^2initial)] I've …
  8. algebra

    in solving the equation (x +2)(x - 2) = 32 eric stated the solution to be x + 2 = 32 => x = 30 or x- 2 = 32 => x = 34. however at least one of these solutions fails to work when plugged back into the equation. why is that?
  9. calculus-can someone please help me with this ques

    I have two questions if someone can PLEASE help. 1.solve the equation in the real number system. x^4+11x^3+24x^2-23x+35=0 **Please show work** 2.Use the remainder theorem to find the remainder. When f(x)is divided by x-3. Then use …
  10. Physics

    An ideal gas in a moveable piston is allowed to reversibly expand by slowly heating at constant pressure. a. Derive the equation for the work done reversibly as a function of the initial and final temperatures.( i have used w=-nrtln(v …

More Similar Questions