Realizing that she often doesn\'t have her students\' full attention during clas

Question

Realizing that she often doesn't have her students' full attention during class, a professor devises an elaborate device on which to stand while she lectures. (Figure 1) The pulley is placed so that the string makes a 45.0-degree angle with the beam. The beam is uniform, 5.00 meters long, and has weight . The professor stands 2.00 meters from the pivot point and has weight . As an incentive to her students, the professor attaches a light basket to the center of mass of the beam and tells them that every student who gets an A on the next test gets to put a ball of mass 4 kilograms into the basket. There are enough students in the class that if a high percentage get A's, the weight of the basket will hoist the professor into the air

Explanation / Answer

For the system to be in equilibrium : (W_p - T) (2) + W_b (2.5) = T(sin 45 degrees)(5) T (((sin 45 degrees)(5)) + 2) = (W_p ) (2) + W_b (2.5) = T(5.5355) T = [(W_p ) (2) + W_b (2.5)]/(5.5355) where Beam's weight is W_b and the professor's is W_p I have not taken the case of balls of 4kg There is no figure and the respective weights are not given. It is impossible to solve the questions without these data. I am very sorry.

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