Question

Natural length of a spring is 60 cm, and its
spring constant is 4000 N/m. A mass of 20 kg
is hung from it. What will be the extension
produced in the spring? (Take g = 9.8 m/s2)​

Answer 1

Answer:

Given, l=60 cm=60×10 -²m

m=20 kg,k=4000 N/m

The weight hung from the spring=mg= 20×9.8=196 N

Let x be the extension produced in spring.

Now, force applied by the spring = downward force on the spring

∴kx=mg⇒x= mg/k

or, x= 20×9.8/4000

=0.049 m=4.9 cm

Explanation:

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