Question

What is the force constant k of a spring which is stretched
• 2 mm by a force of 4 N,
• 4 cm by a mass of 200 g?

Answer 1

Answer:

1) K=200 N/m

2)K=50 N/m

Explanation:

in 1st case when the spring is stretched by 4 N

Kx=4

K ×2=4

so

K=2 N/mm=200 N/m

in 2nd case

gravity pulling the mass 200g (0.2 kg) downward while spring force(kx) trying to resist the gravitation pulling

so

Kx=mg

K×4=0.2×10

k=0.5 N/cm=50 N/m

Answer 2

Answer:

k = 200n/m

k=50 n/m

Explanation:

kx=4

k X 2 = 4