Recent content by homo-sapiens

Homework Statement find points where function is differentiable http://puu.sh/cqrc8/f96bd06aee.png Homework Equations H(x) = 1, x >= 0 H(x) = 0, x < 0[/B] The Attempt at a Solution i Draw a number line and see where the function would change or jump. and immediately i noticed that the...

Can you accelerate on icy surface?

Homework Statement The 87 kg painter in the figure below is using a large stepladder. The base of the ladder is 3 m wide, and the ladder is 7 m high. The painter is on a step that is 2.0 m above the floor. The horizontal bar of the ladder has a mass of 12 kg, and the entire ladder has a mass of...

Both of you are completely correct, thanks for pointing out the mistake. I really didn't need the force of pin. As for the direction of force of the pin, i honestly wouldn't know which way is the right direction, in my book "nelson, Physics for scientists and engineers" it said the direction of...

it's not at right angle with the beam, i assumed it would be acting in the direction with the same as the direction of the extension of the AC bar. and i would assume that there would be another Force of pin which i would name Fp' acting on the second bar... would the reaction force Fp be acting...

Homework Statement You are designing the crosspiece for the A-frame structure in the figure below. Beams AB and AC are 3.35 m long and have a mass of 350.0 kg each. How much tension must the crosspiece EF withstand? Assume that the mass of the crosspiece and the friction at points B and C are...

Homework Statement I am going to have my circuit mid-term very soon, and I always used wolfram alpha to solve my mesh system of equations. I am just wondering if there is an easiest accurate way to solve for systems of equations from mesh and nodal analysis. For example, my classmate suggested...

Homework Statement For the circuit shown below, find the R equivalent resistance between terminals A and B. http://puu.sh/bX1Sp/33db39d1c0.png Homework Equations parallel and series circuit definition[/B]The Attempt at a Solution I admit that I don't even know where to begin with this...

http://puu.sh/bTRBF/53f9460841.jpg This is the textbook answer, could it be that the textbook is misprinted?

Homework Statement A 205 g cube slides down a ramp starting from rest as shown in the figure below. The ramp has a 46° slope. After falling a distance of 92 cm, the cube strikes a spring of spring constant k = 21 N/m. Find the maximum compression of the spring when the coefficient of kinetic...

OH! thank you so much for clearing this up for me. aw, never thought the answer key would be wrong. I guess I should believe in my methods more often. thank you again.

ops! that was a minor mistake on my part, but the answer is still not right with the answer key... here is the answer key http://puu.sh/bQDw6/e03756b3b0.jpg

Homework Statement Determine the power absorbed by the 15 ohms resistor, see circuit below.(the ix, i1, and i2 are things i added) http://puu.sh/bQyEk/5f47888b03.png 2. Homework Equations the KCL law the KVL law the ohm's law power = voltage * current The Attempt at a Solution I calculated...

the masin(θ) is the pseudo force of small block with respect to the big M. Also, i don't think conservation of energy and momentum is viable in this case, since the question stated "Use any variable or symbol stated above along with the following as necessary: g." i don't think i can just use...

http://puu.sh/bMPIE/b03325effc.png I guess I should check with my prof about it. thanks for the reaffirmation