Recent content by asura

Homework Statement A common physics demonstration consists of a ball resting at the end of a board of length L that is elevated at an angle of theta with the horizontal. A light cup is attached to the board at Rc (Rc is a distance up the board from the bottom, it is not past the support...

i appreciate the response, but that sounds like guess and check is there a method that will always show you the correct answer?

wow i copied the question wrong, c is supposed to be 30 for some reason i put 11... but my question is still the same which answer is correct

Homework Statement Solve triangle ABC... A = 50 degrees b= 15 c = 11 Homework Equations Law of Cosine and Law of Sine The Attempt at a Solution since I have two sides and the angle in between, I used law of cosine to find a a2 = 302 + 152 - 2(30)(15)cos 50 a = 23.38 then since I have...

Homework Statement Water falls at the rate of 250 g/s from a height of 60 m into a 780 g bucket on a scale (without splashing). If the bucket is originally empty, what does the scale read after 2 s? Homework Equations p=mv F\Deltat=\Deltap The Attempt at a Solution So I assumed that the...

Hi, I'm a junior at my high school taking physics B and I planned to take physics C next year but then I found out its not offered at my school. So now I want to self study it and take the AP test during May of senior year, but would this be worth it, since neither the class nor the score on the...

can you explain how to do part B im not exactly sure how to set it up heres what i have: (mass = 2.4 kg and k = 117.72 N/m) (PEg + PEs)i = (PEg + KE)f mgh + .5kx^2 = mgh + .5mv^2 2.4 kg (9.81 m/s^2) (0.1 m) sin 30 + .5(117.72 N/m)(0.60 m)^2 = 2.4 kg (9.81m/s^2)(0.70 m) sin 30 + .5(2.4 kg)...

I need help with this too... I keep getting a negative acceleration and I'm pretty sure I did everything correctly. Cu block = 8 kg Al block = 1 kg theta = 30 ∑Fx (Al) = ma = T - Fs ---> T = Fs + ma ∑Fx (Cu) = ma = sin 30 x mg - T - Fs Substitution yields... a (m + m) = sin 30 x mg - Fs (Al)...

Homework Statement ABC is an equilateral triangle with sides of 2 cm. BC is extended its own length to point D and point E is the midpoint of AB. ED meets AC at F. Find the area of quadrilateral BEFC in square centimeters in simplest radical form. Show all work and clearly label figure(s)...

Homework Statement show that sqrt(x+b) - sqrt(x-a) >= sqrt(x+a) - sqrt(x-b) where x >= a >= b >= 0 Homework Equations none The Attempt at a Solution My instructor said that we had to use an indirect proof. The give statement is "if x >= a >= b >= 0, then sqrt(x+b) - sqrt(x-a)...

Could someone explain the concept of a battery I've looked it up in my textbook and wikipedia, but it doesn't really help Here is what I think I understand 1. Charges (electrons) are made in the cell by chemical reactions 2. They complete the circuit by leaving one of the terminals and...

Problem: A force is applied to a door at an angle of 55.4° and 0.33 m from the hinge. (a) What force produces a torque with a magnitude of 2.12 N·m? (b) How large is the maximum torque this force can exert? Relevant Equations: T=Fd My Attempt I could do part a (force is 7.8 N), but...

ok, I understand now. I forgot gravity also had an opposite force. thanks

Homework Statement As an object falls toward Earth a. the object does not exert a force on earth b. the object exerts a downward force on earth c. Newton's third law does not apply d. the upward acceleration of Earth is negligible because of its large mass Homework Equations...