Q: A spring of natural length 80cm with a load has a length of 100cm. If it is slightly pulled down and released its period will be
(a) 3s
(b) 0.9s
(c) 0.81s
(d) 2s
Ans: (b)
Sol: kx = mg => m/k = x/g
$\displaystyle T = 2\pi \sqrt{\frac{m}{k}} $
Science and Education
Q: A spring of natural length 80cm with a load has a length of 100cm. If it is slightly pulled down and released its period will be
(a) 3s
(b) 0.9s
(c) 0.81s
(d) 2s
Ans: (b)
Sol: kx = mg => m/k = x/g
$\displaystyle T = 2\pi \sqrt{\frac{m}{k}} $