The force exerted on a spring is proportional to the distance the spring is stretched from its relaxed position. Suppose you stretch a spring a distance of d inches by applying a force of F pounds. For your spring, d/F = 0.8. You apply forces between 40 lb and 54 lb, inclusive. What inequality describes the distances the spring is stretched?
a. 32 ≤ d ≤43.2
b. 40 < d < 54**
c. d < 32 or d > 43.2
d. d < 40 or d > 54
The right answer is A I just took the quiz and got 100%
right answers are:
A
B
B
C
D
A
Just took it!
It cannot be D. You have a range of forces, which will produce a range of distances. Stop guessing.
d/F = 0.8
d = 0.8F
40 <= F <= 54
0.8*40 <= 0.8F <= 0.8*54
32 <= d <= 43.2