Question
A 16.0-m uniform ladder weighing 490 N rests against a frictionless wall. The ladder makes a...
A 16.0-m uniform ladder weighing 490 N rests against a frictionless wall. The ladder makes a 55.0° angle with the horizontal.
(a) Find the horizontal and vertical forces the ground exerts on
the base of the ladder when an 820-N firefighter has climbed 4.20 m
along the ladder from the bottom.
Horizontal Force
| magnitude | N |
| direction | ---Select--- towards the wall away from the wall |
Vertical Force
| magnitude | N |
| direction | ---Select--- up down |
(b) If the ladder is just on the verge of slipping when the
firefighter is 9.20 m from the bottom, what is the coefficient of
static friction between ladder and ground?
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