Recent content by snav96

Thank you for your help

i think it's the fulcrum that is providing an upward force, keeping it in equilibrium

Homework Statement http://tinypic.com/r/24mua0h/8 Homework Equations I've done all parts except question 3, which I'm not sure. is it because the fulcrum is providing an upward force to keep the load in the air? The Attempt at a Solution

http://tinypic.com/r/161m64l/8 this is my attempt at the question. if it tips would the forces along the y-axis get unbalanced? N> mg ?

Homework Statement http://tinypic.com/r/sebqc1/8 Homework Equations can anyone help me with this question? I know i have to use torques to find the answer but i have no idea how to solve it and write equations for it. thanks The Attempt at a Solution

so it is it just 4.5N x 1200m ?

A cross-country skier ascends a peak and rises 300 m vertically during the ascent. Her mass including clothing skis, poles, shoes and backpack is 65 kg. (a) Find the minimum mechanical work needed to be done by the skier (neglect friction). (b) Why do we not need to consider the skier’s...