Recent content by jcfor3ver

Homework Statement First of all, the image for this problem is in an attachment (Jpeg), if you cannot view it let me know and I can change the format. A positively charged particle moves through a region with uniform electric field pointing toward the top of the page and a uniform...

HELP PLEASE! A pt charge question. Homework Statement Would a rod with +2Q charge repel a +q charge (placed a distance d from the center of the rod) more than a +2Q point charge repelling a +q charge (same distance away as the rod charge) ? Homework Equations Eforce=k(q1)(q2)/d^2...

Homework Statement How would I solve for L in this expression: sintheta=L/sq.rt(x^2+L^2) ? Homework Equations sintheta=L/sq.rt(x^2+L^2) ? The Attempt at a Solution and if they have the same angle between them would solving for L create an equal answer using...

Homework Statement Here is the problem: x=y-1=2z and the equation of the plane is 4x-y+3z=8 Homework Equations The Attempt at a Solution Ya so i got the normal line to be <1,1,-1/2> but i do not know where to go from here? help please?

Homework Statement The two strings in the figure are of equal length and are being driven at equal frequencies. The linear density of the left string is 2.4 g/m Homework Equations AND ATTEMPT AT SOLUTION Assume that while the spring provides the same tension to both strings it also...

Homework Statement Heres the question. Use shell method to find volume: y=3+2x-x^2 with boundaries: y=0, x=0, intercept x=3 and rotate around x=4 Homework Equations I know that V=2pi (integral from 0 to 3) (radius)*(height) dx The Attempt at a Solution My radius was...

1)So I will describe my lab situation first, then ask my main questions. In my physics class we had an inclined air track, with 5 masses (carts) and 5 springs connected in between them. We turn on the air track to replicate a mostly 'frictionless' surface. Now we did several trials writing...

Homework Statement The ends of two identical springs are connected. Their un-stretched lengths Lo are negligibly small and each has spring constant k. After being connected, both springs are stretched an amount L and their free ends are anchored at y = 0 and x = ±L as shown . The point...

"Crumple Zone" --Need help to better understand por favor [b]1. Estimation. “Crumple Zone” a. Crumple zones in cars are designed to reduce the acceleration in a collision with a stationary object. Estimate a relation between the size of the crumple zone, the initial speed of the car, and the...

The online problem told me that P=C_d*A*v^2 and to only express my answer using the terms C_d, A, and v. So then how would I express this? I thought I was correct the first time but this seemingly simple problem is causing me trouble now.

[b]1. Homework Statement The dominant form of drag experienced by vehicles (bikes, cars, planes, etc.) at operating speeds is called form drag. It increases quadratically with velocity (essentially because the amount of air you run into increases with and so does the amount of force you must...

Homework Statement A uniform board of length and mass lies near a boundary that separates two regions. In region 1, the coefficient of kinetic friction between the board and the surface is , and in region 2, the coefficient is . The positive direction is shown in the figure...

Homework Statement The rope of a swing is 2.90 m long. Calculate the angle from the vertical at which a 81.0 kg man must begin to swing in order to have the same KE at the bottom as a 1450 kg car moving at 1.05 m/s (2.35 mph). Homework Equations KE=1/2mv^2 PE=mgh SOH CAH TOA (trig...

Homework Statement The left side of the figure shows a light (`massless') spring of length 0.320 m in its relaxed position. It is compressed to 74.0 percent of its relaxed length, and a mass M= 0.230 kg is placed on top and released from rest (shown on the right). The mass then travels...

to snshusat161, what does the u mean in your equations?