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67./A spring ofspring constant 5 × 103 N m-1 is stretchedinitially by 5 cm from the unstretched position. Thework required to stretch it further by another 5 cm isIAIIMS-2014](A)(C)6.25 N m18.75 N m(B) 1250 N m(D) 25.00 N ml tling hu machine with |
Answer» <p>W = 1/2*(k)*((x2)²-(x1)²)</p><p>=> w = 1/2*5000*[100-25]/10⁴ = 75/4 = 18.75 Nm</p><p>option C</p> | |