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- Thread starter Terrell
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- #1

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- #2

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You need a better free body diagram, showing the forces at the top and bottom of the ladder.

- #3

wrobel

Science Advisor

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It is convenient to calculate torques about one of two contact points of the ladder and the wall/floor.

- #4

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but that is all that is given. i found this here for practice problems http://www.real-world-physics-problems.com/friction-problems.html#hint_for_problem_4You need a better free body diagram, showing the forces at the top and bottom of the ladder.

- #5

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can i solve this without torques? i haven't got into torques just yet

It is convenient to calculate torques about one of two contact points of the ladder and the wall/floor.

- #6

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No. You have three unknowns, the two normal forces and the angle. So you need three equations. Only two are available from linear force balances in two dimensions, so your third must be from torque balance.can i solve this without torques? i haven't got into torques just yet

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