Recent content by vinnyzwrx

Homework Statement A uniform piece of sheet steel is shaped as pictured. compute the x and y coordinates of the center of mass of the piece https://tdsal.homeserver.com/photos/photos%20hosted%20on%20internet/q6%20.jpg Homework Equations cm = sum of all of the masses multiplied by...

right, 56.98 rad/s Thanks!

Homework Statement A rotation wheel required 3.0 s to complete 37 revolutions. its angular speed at the end of the 3.0 s interval is 98 rad/s. what was the original angular speed of the wheel? Homework Equations average omega = change in angle/change in time The Attempt at a...

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should the spring constant be multiplied by 20 to compensate for the 20 springs, or should the answer be divided by 20? i don't see where i went wrong in my math...

Homework Statement The innerspring mattress on your grandmother’s bed is held up by 20 vertical springs, each having a spring constant of 5000 N/m. A 48 kg person jumps from a 1.95 m platform onto the innersprings. The acceleration of gravity is 9.8 m/s2 . Assume: The springs were initially...

-22.35. Thanks a lot, I can't believe I didn't see that.

if work = 1/2kx^2 then all i need to find is the constant k given the information... i don't see how i can do this because i don't know x for the given equation, it just tells me that its near its elastic limit

the entire problem is simple, i figured it out so i thought i would post it in case anyone would stumble upon this in the future Find the magnitude of the force. Answer in units of N. this is just the length force vector, duh... Calculate the work done by F⃗ . Answer in units of J. this is...

ok so maybe its negative because the spring would be working to go back to its equilibrium position. My answer is wrong though, what am i doing wrong? am i right in my approach? i really can't think of another way of going about it... a hint would be very nice

its simple, i figured it out... i feel like an idiot pythagorean theorm, magnitude = sqrt(1.74^2 + 4.3^2)

im a student as well but i think i may be able to help, sum of forces = ma frictional force = (mu)normal force and the normal force = mg mu = friction coefficient find acceleration via the constant acceleration formulas without time

Homework Statement At a certain point, when a spring is stretched near its elastic limit, the spring force satisfies the equation F = −α x + β x3 , where α = 12 N/m and β = 890 N/m3 . Calculate the work done by the spring when it is stretched from its equilibrium position to 0.15 m...

Homework Statement A particle moving in the xy plane undergoes a displacement ⃗s = (sx ˆi + sy ˆj), with sx = 1.74 m, sy = 4.3 m, while a constant force F⃗ = (Fxˆi+Fyˆj), with Fx = 5.1 N, Fy = 1.95 N, acts on the particle. Calculate the magnitude of the displacement. Answer in units of m...