If M = 2.0 kg, what is the tension in string 1?
A) 1.2 N
B) 11 N
C) 34 N
D) 3.5 N
E) 40 N

Question

If M = 2.0 kg, what is the tension in string 1? 
A) 1.2 N 
B) 11 N 
C) 34 N 
D) 3.5 N 
E) 40 N

Quizplus · Accepted Answer

Using Newton's second law, we can find the tension in string 1 by setting the sum of the forces in the y-direction equal to the mass times acceleration (which is zero in this case since the object is not moving vertically). The tension in string 1 is equal and opposite to the weight of the object (M*g), so we have:

T1 - M*g = 0
T1 = M*g

Plugging in the numbers, we get:

T1 = 2.0 kg * 9.8 m/s^2 = 19.6 N

Therefore, the tension in string 1 is 19.6 N, which is closest to answer choice C (34 N).

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