Question: 9 . 2 Rigid Objects in Equilibrium A window washer attempts to lean a ladder against a frictionless wall. He finds that the ladder slips

9.2

Rigid Objects in Equilibrium

A window washer attempts to lean a ladder against a frictionless wall. He finds that the ladder slips on the ground when it is placed at an angle of less than

75

relative to the ground, but it remains in place when the angle is greater than

75 .

Determine the coefficient of static friction between the ladder and the ground.

It depends on the length of the ladder.

about

1.3

about

0.27

about

0.13

It depends on the mass of the ladder.

9 . 2 Rigid Objects in Equilibrium A window

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