67./A spring ofspring constant 5 × 103 N m-1 is stretchedinitially by

1.	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» W = 1/2(k)((x2)²-(x1)²) => w = 1/25000[100-25]/10⁴ = 75/4 = 18.75 Nm option C

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»

W = 1/2*(k)*((x2)²-(x1)²)

=> w = 1/2*5000*[100-25]/10⁴ = 75/4 = 18.75 Nm

option C