A spring of spring constant 5 x 10³ N/m is stretched initially by 5 cm from the unstretched position. The work required to stretch it further by another 5 cm is

Options

(a) 18.75 N-m
(b) 12.5 N-m
(c) 6.25 N-m
(d) 25 N-m

Correct Answer:

18.75 N-m

Explanation:

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