Solve the problem.
-If a spring stretches 0.4 m when a 8-kg weight is attached to it, how much will it stretch when a 28-kg weight is attached to it?
A) 0.4 m
B) 3.4 m
C) 4.4 m
D) 1.4 m

Question

Quizplus · Accepted Answer

The stretch of a spring is directly proportional to the force applied to it (Hooke's Law). The force due to gravity is mass times the acceleration due to gravity (F = mg). When the weight increases from 8 kg to 28 kg, it's a 3.5 times increase (28/8 = 3.5). Since the original stretch was 0.4 m, the new stretch will be 0.4 m * 3.5 = 1.4 m.

Solve the Problem. -If a Spring Stretches 0.4 M When a 8-Kg Weight