Question Number 34571 by NECx last updated on 08/May/18
$${A}\:{machine}\:{with}\:{a}\:{velocity}\:{ratio} \\ $$$${of}\:\mathrm{5}\:{requires}\:\mathrm{150}{J}\:{of}\:{work}\:{to}\:{raise} \\ $$$${a}\:\mathrm{500}{N}\:{load}\:{through}\:{a}\:{vertical} \\ $$$${distance}\:{of}\:\mathrm{200}{cm},{calculate}: \\ $$$$\left.{a}\right){the}\:{efficiency} \\ $$$$\left.{b}\right){the}\:{M}.{A}\:{of}\:{the}\:{machine} \\ $$