Question

Find the extention in the spring, if mass of the block is $6\text{kg}$ and spring constant of the spring is $120\text{N/m}$. [Take $g=10{\text{m/s}}^2$]

• A. $1\text{m}$
• B. $0.5\text{m}$
• C. $0.9\text{m}$
• D. $1.2\text{m}$

Answer 1

The correct option is B $0.5\text{m}$

Let $x$ be the extension of the spring.

The spring force will balance the weight of the block.
So, $mg=Kx$
$6\times 10=120\times x$
or $x=0.5\text{m}$