Recent content by Seung Lee

Homework Statement So for a project, we decided to do tension strings that would be attached to a wheelchair inside a subway so that when the subway decelerates or accelerates, the wheelchair wouldn't move. However, due to our inexperience we used only the wheel and solved for equations. If I'm...

yeah, but you still can't solve for the distance can you? i mean you need the distance in W(friction) and you also don't ahve the velocity in 1/2mv^2, which means you have two unknowns in one equation.

Isn't that why the equation is 1/2mv^2 = 1/2kx^2 = frictional potential? I mean another problem is that the answer keeps being 10.96m instead of actualyl beeing a small number

Homework Statement A horizontal spring with psring constant k = 15.19 N/m is compressed 23.11 cm fro mits equil. position. A hockey puck with mass m = 170.0g is placed against the end of the spring. The friction coefficient is 0.02221. How far does the hockey puck travel? k = 15.19 N/m x =...

Oh! Ok, I think fixing the cos and sin around helped me out it was mg cost + Forceappliedsin = Normal force (sum of forces in y) and mg sin + friction - Forceappliedcos = ma I just have another question. The acceleration here would be negative right? My teacher had told me that itw as positive...

Homework Statement I got this problem: A wedge of mass m = 36.1 kg is held in place on a fixed plane that is inclined by an angle θ = 21.3° with respect to the horizontal. A force F = 302.3 N in the horizontal direction pushes on the wedge, as shown in Figure 4.25a. The coefficient of kinetic...