Question

A spring has a spring constant of 5N/cm. What is its extension when loaded with 15N?

a. 4cm
b. 5cm
c. 3m
d. 3cm​

Answer 1

Pretty sure a it’s d since every cm increases by 5N meaning 3 cm would increase it by 15N

Answer 2

As per given Information

• Spring Constant ,K = 5N/cm
• Force , F = 15N

we have to find the extension when loaded with given magnitude of force.

Using Formulae

`\bf \: F = Kx \:`

where, x is extension

Putting the value we get

`\sf \twoheadrightarrow \: 15 \: = 5 * x \\ \\ \sf \twoheadrightarrow \: (15)/(5) = x \\ \\ \sf \twoheadrightarrow \cancel (15)/(5) = x \\ \\ \sf \twoheadrightarrow \: 3cm \: = x`

• Hence, the extension is 3 cm

So, required option is (d) 3 cm