試題詳解

34. Two blocks connected by a cord (of negligible mass) that passes over a frictionless
pulley (also of negligible mass). The arrangement is known as Atwood’s machine.
One block has mass m1=1.3 kg; the other has mass m2=2.8 kg. What is the magnitude
of the tension of the cord?

(A) 11.0 N
(B) 12.8 N
(C) 15.7 N
(D) 17.7 N
(E) 20.0 N