The material hoist and the load have a total mass of

$700kg$ and the counterweight $C$ has a mass of $100kg$

$($Eigure $1)$

If the upward speed of the hoist increases uniformly from to $0\mathrm{.}9\frac{m}{s}$ to $2\mathrm{.}5\frac{m}{s}$ in $15s,$ determine the average power

generated by the motor $M$ during this time. The motor operates with an efficiency of $lon=0\mathrm{.}8.$

Express your answer to three significant figures and include the appropriate units.

$P_{\text{a}\text{v}\text{g}}=$

$P_{\text{a}\text{v}\text{g}}=$

Figure