Practice Problem 4.7 Now let’s apply our problem-solving strategy to a system in

Question

Practice Problem 4.7

Now let’s apply our problem-solving strategy to a system in equilibrium. To improve the acoustics in an auditorium, a sound reflector with a mass of 200 kg is suspended by a chain from the ceiling. What is its weight? What force (magnitude and direction) does the chain exert on it? What is the tension in the chain? Assume that the mass of the chain itself is negligible.

1. The weight of the reflector (the earth’s gravitational pull) and the force the reflector exerts on the earth form an action–reaction pair. Determine the magnitude of the weight of the reflector (the earth’s gravitational pull) if the refloctor's weight is now given as 200 kg

2. Determine the magnitude of the force the reflector exerts on the earth if the reflector's weight is now given as 200 kg .

Explanation / Answer

Weight of the reflector, = m*g
W = 200 * 9.8 N
W = 1960 N

Force Chain Exert on the Reflector = Tension Force.
Direction is Upwards.

As there is no motion & the system is in equilibrium.
Tension in the Chain, T = Weight of the reflector
T = 1960 N
Tenison, T = 1960 N

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