Recent content by GnG.Vike13

okay, it's good to know that i understand this. one more question, perhaps. what happens if the block isn't tipping over and the frictional force is applied completely on block's bottom side? how do you look at the problem then?

so the translational kinetic energy is based on its center of mass' velocity and the rotational energy is based on the I of the whole block and w? and, just to be clear, the weight vector will always come from the center of mass, correct? also, how would friction play into this? would it be at...

i don't understand this at all... if we tip over a rectangular block (such that a corner is its pivot), will it have rotational kinetical energy, translational kinetic energy, or both when it hits the ground?

fast misc

we were doing a problem that involved pulling on a normal rectangular block with a horizontal force in class. at the point that it just barely starts tipping, we wanted to figure out the force required. i understood how to do that, but what puzzled me is the blocks weight/force of gravity vector...

So, the work done by gravity is shraed between the two objects, correct? But looking at it from a Newton's Laws perspective, how would you go about solving for the accelerations of each objects? Like, how does the acceleration of the wesdge relate to the acceleration of the block?

I am taking gravity into account. The wedge moves left and the block moves right and down. There is a positive force to the left acting on the wedge and a positive force to the right acting on the block, along with gravity acting down. Therefore, all work done in this problem is positive. Since...

Because a positive work is acted on in the system. Therefore, energy must've been added to it.

Thank you for the reply. I understand that the block will continue to move down along the block... But we had a problem with this concerning conservation of energy. But the work that the block does on the wedge is positive and the work that the wedge does on the block is positive, why is...

Homework Statement A mass of 5kg and wedge of 10kg are held at rest. All surfaces are frictionless. No outside forces are acting on the system. θ of the wedge is 30°. Once the block and wedge are let go, what happens to both objects? What is the acceleration of the block left/right and what...