A spring of spring constant 5 x 103 N/m is stretched initially by 5 cm from the upstretched position. Then work required to stretch it further by another 5 cm is :
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a
12.50 N-m
b
18.75 N-m
c
25.00 N-m
d
6.25 N-m
answer is B.
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Detailed Solution
Work done = =12kx22−x12=125×10310×10−22−5×10−22=18.75N−m
A spring of spring constant 5 x 103 N/m is stretched initially by 5 cm from the upstretched position. Then work required to stretch it further by another 5 cm is :