Question

A veterinarian uses a spring scale to weigh a cat. He records the cat's weight as 2 kilograms and notices the spring stretches 4 centimeters.

Which expression represents the spring constant? (1 kg=9.8 N)

-4k / cm

-4/19.6 N

-19.6N / 4

-4 cm/ k

Answer 1

F = m g = k x
2*9.8 = k * 0.04
19.6 = k * 0.04
k = 19.6 / 0.04 Newtons/meter = 19.6/4 Newtons/ centimeter