1. Two identical boards of mass m, length l, and of uniform density lean against
ID: 2124520 • Letter: 1
Question
1. Two identical boards of mass m, length l, and of uniform density lean against each other as
shown in the figure.
(a) If the boards are in static equilibrium for some fixed angle theta, what are the normal and
friction forces exerted by the floor on the right-hand board?
(b) What is the minimum value of the coefficient of static frictions between the floor and
the board that maintains the static equilibrium.
Two identical boards of mass m, length l, and of uniform density lean against each other as shown in the figure. If the boards are in static equilibrium for some fixed angle theta, what are the normal and friction forces exerted by the floor on the right-hand board? What is the minimum value of the coefficient of static frictions between the floor and the board that maintains the static equilibrium.
Explanation / Answer
There is a normal force exerted by the wall on the riders, the normal force caused the centripetal acceleration experienced by the riders. Its magnitude is:
n = mv
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