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A spring balance has a scale that reads from 0 to 50 kg.The length of the scale is 20cm.A body suspended from this balance,when displaced and released,oscillates with a period of 0.6s.What is the weight of the body?
The spring constant: k = F/length of scale
= mg/l
= 50*9.8/0.2
= 2450 N/m.
Time period: T = 2*pi*sqrt(m/k)
    0.6 = 2*3.14*sqrt(m/2450)
`     m = 22.34 kg.
Weight of the body is W = m g 
= 22.34 × 9.8 
= 218.9 N.
 
 
 
 
 


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