I\'m just trying to find out if its right and if not whats wrong with it Preview

Question

I'm just trying to find out if its right and if not whats wrong with it

Preview File Edit View Go Tools Window Help 60% CD Sun 7:45 PM a- E Exam 2 (page 5 of 12) Q Search Exam 2 Physics 211 Midterm 2 p. 3 of 10 Consider a spring scale. When one of its ends is attached to the ceiling and the other attached to some object it reads the weight of that object. Two objects (weight W and 2W) hang vertically on massless strings attached to a spring scale as shown in the figure. The pulleys are massless and frictionless. In this configuration (where the masses are accelerating!) the reading on the spring scale is 5. w 2W A. less than W B. W more than W, but less than 2W D. 2W E. more than 2W.

Explanation / Answer

It is correct.

as 2Wg - T = 2Wa => T = 2W(g-a)

and Wg - T = -Wa => T = W(g+ a)

Hence W < T < 2W. So option C is correct

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