At an airport, luggage is unloaded from a plane into the three cars of a luggage

Question

At an airport, luggage is unloaded from a plane into the three cars of a luggage carrier, as the drawing shows. The acceleration of the carrier is 0.18 m /s2, and friction is negligible. The coupling bars have negligible mass.

(a) By how much would the tension in each of the coupling bars A, B, and C change if 28 kg of luggage were removed from car 2 and placed in car 1? If the tension changes, specify whether it increases or decreases. (Specify a decrease in tension with a negative value and an increase in tension with a positive value. If there is no change, enter 0.)
TA=  N
TB=   N
TC=   N

(b) By how much would the tension in each of the coupling bars A, B, and C change if 28 kg of luggage were removed from car 1 and placed in car 3? If the tension changes, specify whether it increases or decreases. (Specify a decrease in tension with a negative value and an increase in tension with a positive value. If there is no change, enter 0.)
TA=   N
TB=   N
TC=   N

Explanation / Answer

a) deltaTa = 0

deltaTb = -ma = -28*0.18 = -5.04 N

delta Tc = 0

B) deltaTa = 0

deltaTb = ma = 28*0.18 = 5.04 N

delta Tc = ma = 28*0.18 = 5.04 N

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