Question

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

Answer 1

Answer:

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

$\sf \twoheadrightarrow \: 15 \: = 5 \times x \\ \\ \sf \twoheadrightarrow \: \frac{15}{5} = x \\ \\ \sf \twoheadrightarrow \cancel \frac{15}{5} = x \\ \\ \sf \twoheadrightarrow \: 3cm \: = x$

• Hence, the extension is 3 cm

So, required option is (d) 3 cm

Answer 2

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