If a force F is required to extend a spring by 20 cm,what force is required to extend it by 30 cm?
A)F
B)(2/3)F
C)(3/2)F
D)600F
E)(3/5)F

Question

Quizplus · Accepted Answer

The force required to extend a spring is directly proportional to the amount of extension. Therefore, if a force F is required to extend a spring by 20 cm, then to extend it by 30 cm, we need to apply a force that is 3/2 times the force required to extend it by 20 cm. Thus, the answer is (3/2) F.

If a Force F Is Required to Extend a Spring