Masses of 2 kg and 3 kg hang from the ends of a light string over a smooth pulley (g = 10 m/s squared). What is the tension while they move?
Answer and explanation
Correct answer: C. 24 N
- Step 1: Acceleration m/s squared.
- Step 2: For the 2 kg mass: .
- Step 3: N.
Answer
24 N.
Why not the others: 20 N: the weight of the lighter mass was used, ignoring its acceleration. 30 N: the weight of the heavier mass was used. 25 N: the two weights were averaged.
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