Question

Saara zamana physics ka deewana..


a mass of 2 kg falls from a height of 40 cm on a spring with a force constant of 1960 Newton per metre. the spring is compressed by..??​

Answer 1

Explanation:

Let the distance be x . Now all potential will be converted to spring energy

$mg(0.4 + x) = \frac{1}{2} k {x}^{2} \\ 2 \times 10(.4 + x) = \frac{1}{2} \times 1960 {x}^{2} \\ 1960 {x}^{2} - 40x - 16 = 0 \\ 490 {x}^{2} - 10x -4 = 0 \\ x \approx \: 10 \: cm$