Question Number 198860 by cherokeesay last updated on 25/Oct/23
Answered by mr W last updated on 25/Oct/23
$$\left.{D}\right)\:{is}\:{correct}. \\ $$$${the}\:{force}\:{moved}\:{the}\:{block}\:{to}\:{a}\:{height} \\ $$$${a}\:\mathrm{sin}\:\theta,\:{the}\:{work}\:{done}\:{is}\:{wa}\:\mathrm{sin}\:\theta. \\ $$$${the}\:{force}\:{pulled}\:{the}\:{spring}\:{to}\:{a}\:{length} \\ $$$${a}\theta,\:{the}\:{work}\:{done}\:{is}\:\frac{{k}\left({a}\theta\right)^{\mathrm{2}} }{\mathrm{2}}. \\ $$$${so}\:{the}\:{total}\:{work}\:{done}\:{by}\:{the}\:{force}\:{is} \\ $$$${wa}\:\mathrm{sin}\:\theta+\frac{{ka}^{\mathrm{2}} \theta^{\mathrm{2}} }{\mathrm{2}}. \\ $$
Commented by cherokeesay last updated on 25/Oct/23
$${Nice}\:!\:{thank}\:{you}\:{master}\:! \\ $$