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September 20, 2014

Homework Help: PHYSICS

Posted by Alie on Wednesday, October 24, 2007 at 1:28pm.

There's a bar with length of 6.49m and mass of 5.45kg leaning against a frictionless wall. It makes an angle of 66.08 deg with the ground. A block with mass of 44.98 kg hangs from bar at distance d up from point of contact between bar and floor. The frictional force (us=.371) exerted by the floor keeps the bar from slipping. Find max d that the hanging mass can be attached to bar such that the bar does not slip.

second part: now the hanging mass is detached and removed from the problem. Find minimum angle between bar and ground for which the bar will not slip.

This is my first time on one of these sites and I'm really struggling with physics. will anyone help?

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