Recent content by vineroon

Problem Statement A steel shaft 120 mm in diameter is supported in flexible bearings at its ends. Two pulleys, each 500 mm in diameter, are keyed to the shaft. The pulleys carry belts that produce the forces shown. Determine the internal forces on a vertical section through point A. I've...

Update: I don't know if this is correct, but my guess is that there are 5 degrees of rotational and translational freedom. This would be because they are arranged in a straight line. If they were arranged in a V-shape (such as H2O gas), the degrees of freedom would be 6, correct? If they...

wesDOT is correct. Initial velocity of the puck should not be zero. To cross-post from the other thread about two cars colliding inelastically: m1 : mass of the puck v1 : initial velocity of the puck m2 : mass of the goalie v2 : initial velocity of the goalie v' : final velocity of the...

The main thing you can use in the problem is conservation of momentum: m1v1+m2v2=(m1+m2)v' This equality is a result of the completely inelastic collision. The question asks you to solve for v'.

Homework Statement A triatomic molecule consists of 3 atoms arranged along a straight line. The molecules can translate and rotate but not vibrate. How many degrees of freedom are associated with this molecule? Homework Equations Molar Heat Capacity of Gases: Cv = f/2(R) f -...

I understand that somewhat, but how am I supposed to find the velocity from that? Can I just find the work needed for the object to escape Earth using the change in mechanical energy and then use the work-energy theorem? If so, what mass would I use?

The question: At what speed would a small object have to be launched from the satellite in order to escape earth’s gravity, assuming that the satellite is not moving? The satellite is in circular orbit around the Earth and the radius of the orbit is 4.22 x 10^7. The main problem I am having...

I am not sure if I understand the premises under which conservation of momentum can be considered. First of all, I am aware that momentum is conserved if there are no external forces acting on a system. So, if you are looking at two objects colliding, their momentums will always be conserved if...

Alright, that seems a lot more straightforward. Thanks a lot. :D

I am having trouble applying the concept of momentum conservation to this problem. The particular problem I am having is in figuring out if I did part (c) correctly. A look at Puck A: It is evident that total the momentum is conserved before the collision because the external forces acting...

For problem 2, r is just the distance from O to a point in the line of action of force F. In other words, this is just the distance from O to B. I believe this is <4, -3, 1.5>. I'm not sure as to how you would use a dot product to find theta x, y, and z. However, the easiest solution here...

I have been having trouble with this seemingly easy problem. You would think that it is just as simple as finding Fcos(tan-1(3/4)), which yields the answer 320 N. However, as seen in the image, the actual answer is 420 N. I would appreciate any help. Thanks