A roller of radius a and weight W has to roll over an obstacle of height h. Find out the minimum horizontal force F required to be applied. The reaction of the obstacle is shown as R.

Question

anonymous · Answer

http://nptel.iitm.ac.in/courses/Webcourse-contents/IIT-%20Guwahati/engg_mechanics/chap1/problems/flash/prob4_lec2.gif

anonymous · Answer

Take moments about the point of contact with the obstacle. The reaction force will play no role about it.

anonymous · Answer

Also the normal force with the ground will be zero

anonymous · Answer

A similar problem http://ocw.mit.edu/courses/physics/8-01-physics-i-classical-mechanics-fall-1999/assignments/assign10.pdf

anonymous · Answer

Its solution http://ocw.mit.edu/courses/physics/8-01-physics-i-classical-mechanics-fall-1999/assignments/sol10.pdf

anonymous · Answer

thanks