Recent content by Lis

on the top off L?

I don't think i understand you quite. Do you mean " Therefore we can view gravity as acting on the length of the two masses"?

Homework Statement A teeter toy is composed of a massless central stick of length L and two massless sticks of length l attached at angles α, each with a mass m at the end (see the figure). We imagine tilting the toy by an angle θ from the upright position. a) Find an expression for the...

I totally agree with you. Thank you! I was running out of time earlier so that might be the reason why i did those silly mistakes.

Great! Thank you :-)

Okey so the answer i solved belongs to the problem where the passenger does not hold on to something? So fore the case where the passengers is holding on: vi= sqrt(2gh) Correct?

Great! I could also need some help in b: b) What is the minimum value of vi, for the car to get to the top of the loop, and for the people to not fall out as it goes round, even when not holding on to anything? Can you give me some hints here as well?

ops, ok i´ll try again: 1/2mvi^2 + mghi = 1/2mv^2 + mghf Multiplyng by 2 mvi^2= mv^2 + 2(mghf) vi=sqrt(mv^2 + 2(mghf))

Thank you for answering. 1/2mvi^2 = 1/2mvf^2 vi^2=sqrt(r*g) Is that correct?

In an amusement park, the new roller-coaster ride The Loopy Looper is com- posed of a number of full loops, where the car goes round upside down. The car is attached to the track, but there are no seat belts. Consider one such loop, which can be taken as a circle with radius r. The mass of the...

Can anybody explain how to solve c?