3.A 740-kg elevator accelerates upward at 0.2 m/s2, pulled by a cable of negligible mass. Note that the acceleration due to gravity g = 9.8 m/s2. What is the tension force in the cable?
(A) 74 N
(B) 740 N
(C) 7400 N
(D) 74000 N
(E) None of the above
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統計: A(0), B(0), C(5), D(0), E(0) #3427003
統計: A(0), B(0), C(5), D(0), E(0) #3427003