Question

A nylon string with original length 20cm is pulled by a force of 10N. The change in length of the string is 2cm. Determine the magnitude of force if the change in length is 6cm.


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Answer 1

ANSWER:

30N

EXPLANATION:

THE ORIGINAL LENGTH OF STRING IS 20cm

$force = 10n \\ change \: in \: length = 2cm \\ ratio \: of \: f \: to \: l = 10 \div 2 = 5 \div 1 \\ if \\change \: in \: length = 6cm \\ force = 5 \div 1 = x \div 6 = \\ x = 5 \times 6 = 30$