Posted by rachel on Sunday, February 26, 2012 at 9:55pm.
A uniform ladder 10.0 m long is leaning against a frictionless wall at an angle of 60.0° above the horizontal. The weight of the ladder is 21.8 lb. A 57.8lb boy climbs 4.38 m up the ladder. What is the magnitude of the frictional force exerted on the ladder by the floor?

physics  Riley, Monday, February 4, 2013 at 1:20am
70mtr
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