Recent content by g.licata

But the forward force is parallel to radius of the car, so the cross product would be zero, right?

Can anyone explain it to me? Why does the front end of the car lift forward when it is accelerating forward? Is there a torque that is causing this lift?

Sorry I forgot to update this. So my professor explained how to solve it and apparently question is formed correctly and does not need to be fixed or anything. The way to solve is to observe that the maximum acceleration the car can have on the track is found by solving for the acceleration in...

Please, anybody? I need an insight, I am staying up all night but still can't figure this one out. It's due in like 5 hours...

Should I be using the equation time = 2 * pi * r / velocity? But the arc is not a full circle?

http://img268.imageshack.us/img268/1720/problem1s.png I added picture of the problem, hopefully that will make it clearer. Please help! Thank you!

Can anyone make a suggestion on how I can proceed with this problem? It is due tomorrow, so please help. Thank you!

Homework Statement A car is tested along specifically designed track. First, the car is driven along a straight section of track of length (r). If the car starts from rest under a maximum (constant) acceleration, it takes an amount of time (t) to cover the distance (r). The car is then brought...

Oh sorry, I somehow forgot to put in r is the radius of the circular arc.

Homework Statement A car is driven along straight section of track length (r). The car started from rest and the time it took to cover r distance is (t). If the same car is then tested on a circular arc of radius r, starting from rest and continues to speed up at the maximum possible rate that...

I tried using what you said but how would I solve for x? Do I take the derivative of Tension with respect to x?

I drew up a FBD and I got the equations: F_gravity - Tension = m_1 * a Tension = m_2 * a I solved for a, which is a = Tension / m_2 Then I plugged that into the original equation. The breaking force for the cable is going to be Tension = density * k * g I plugged that into the...

Ibix, I'm not sure I understand what you just said. But if I were to assume that the length of the cable hanging over the table and the length of the cable still on the table to be the same, I get the maximum length to be 4k, can anyone confirm if this is correct? I have a feeling that the...

Ok so the length can't be k. But I have a question, would it be correct to say that when the cable breaks, the length of the cable that is still on the table has to be equal to the length of the cable hanging over the side? Thanks.

I got the length of the cable on the table is k, the same as the length of the cable as when it was hung vertically. That doesn't seem right does it?