Homework Statement
The horizontal force P acts on the rim of the homogeneous cylinder of radius R and weight W. Determine the smallest coefficient of static friction that enables the cylinder to start rolling up the 30◦ incline.
Homework Equations
*depends on the fbd. refer below...
Homework Statement
The two homogeneous bars AB and BC are connected with a pin at B and placed between rough vertical walls. If the coefficient of static friction between each bar and the wall is 0.4, determine the largest angle θ for which the assembly will remain at rest...
i tried evaluating this http://www4a.wolframalpha.com/Calculate/MSP/MSP47881a005158fa72fi31000026df4f1iaf7g05e7?MSPStoreType=image/gif&s=49&w=109&h=39
and the correct answer r = 1.1147 and theta = 75.9
however, i tried to do it manually and ended with this...
Homework Statement
Resolve the position vector A of the car (measured from fixed point O)
into components parallel to OB and OC.
Figure: http://screensnapr.com/e/4D2OAz.png
Homework Equations
Projection of vector A to OC = |A| * |unit vector OC| * unit vector
The Attempt at a...
Homework Statement
To move the oil drum, the resultant of the three forces shown must have
a magnitude of 500 N. Determine the magnitude and direction of the smallest
force F that would cause the drum to move.
here is the figure: http://screensnapr.com/e/yliMVN.png
Homework...
Hello, I am referreing to question 6.4a, (the one in black pen)
http://i55.tinypic.com/2e2md0z.jpg
tnx. I've tried my best but where did i go wrong? what's ur answer?
Homework Statement
A factory worker pushes a 30.0-kg crate a distance of 4.5. along a level floor at constant speed by pushing horizontally on it. The coefficient of kinetic friction between the crate and the floor is 0.25. (a) What magnitude of force must the worker apply?
Homework...