Recent content by vtech

your conversion for the first part seems to be off... recheck it... and make sure you convert to meter seconds... but you're on the right track

help please~! anyone out there? i don't need to give me the answer... could anyone just point me in the right direction? how to find the i-hat vector forces in this problem? thanksss a lot

torque/force problem - two door hinges - help anyone? A large door of height - 2.1 m - along y-axis that extends vertically upward and width - 0.95 m - along x-axis that extends outward from the hinged edge of the door. A hinge at 0.30 m from the top and a hinge at 0.30 m from the bottom, each...

can anyone help on this one? surely there is someone that can help out with this problem? i understand the concept of the torque acting with the forces, but i am unsure as to how i can relate this with the tensions! help anyone? i would really appreciate it!

can anyone show me how to include a figure/graph in my question area instead of putting in as an attachment??

Wer are given two objects of mass m1 = .20 kg and m2 = .67 kg, which are connected by a massless cord that is wrapped around a uniform disk of mass M = 0.50 kg and radius R = 0.12 m. The disk can rotate without friction about a fixed horizontal axis through its center; the cord cannot slip on...

did u get d) for the elevator? Ugrav (as a function of S + dup) = Uspring (as a function of S) + F(friction) L solve for L... i thought it made sense... but i didn't get the right answer!... wut do u think??

other ? hey randomphyre, i was wondering... have u gotten around to ch8 #66 part (c)... any clues? its the crates falling on the conveyor belt... energy supplied by motor?

actually, ur right... friction only acts during d up... my original equation had friction acting at (s + d up) it should be: 1/2kx^2 = mg(d up) + Friction(d up)

question? i solved the quadratic, but is it the negative s because its in compression or not?... i got either 0.90 or -0.72... I'm thinking its the positive... but i only have 1 try left... which one did u use? just want to make sure!

parts c) and d) (c) What is the change in the gravitational potential energy of the stone-Earth system when the stone moves from the release point to its maximum height? *** as you said, J gravitational potential energy is mgy but i don't know y, but from conservation of energy you know that...

elevator problem - urgent help! The cable of the 1800 kg elevator snaps when the elevator is at rest at the first floor, where the cab bottom is a distance d = 3.7 m above a cushioning spring whose spring constant is k = 0.15 MN/m. A safety device clamps the elevator against guide rails so that...

You are given an 8.00 kg box resting on a spring. The spring is compressed 7.0 cm by the box. (a) What is the spring constant? ____ N/cm (b) The box is pushed down an additional 30.0 cm and released. What is the elastic potential energy of the compressed spring just before that...

Jack, who weighs 653 N, swings from a cliff at the end of a convenient vine that is 26 m long. From the top of the cliff to the bottom of the swing, he descends by 3.2 m. The vine will break if the force on it exceeds 950 N. (a) Does the vine break? yes / no (b) What is the greatest force...

Jack, who weighs 653 N, swings from a cliff at the end of a convenient vine that is 26 m long. From the top of the cliff to the bottom of the swing, he descends by 3.2 m. The vine will break if the force on it exceeds 950 N. (a) Does the vine break? yes / no (b) What is the greatest force...