Robert has just bought a new model rocket, and is trying to measure its flight characteristics. The rocket engine package claims that it will maintain a constant thrust of $13\mathrm{.}8$ N until the engine is used up$.$

Robert launches the rocket on a windless day, so that it travels straight up$,$ and uses his laser range$-$finder to meaure that the height of the rocket when the engine cuts off is $16\mathrm{.}8$ m $.$ He also measures the rocket's peak height, which is $21\mathrm{.}3$ m $.$

If the rocket has a mass of $0\mathrm{.}613$ kg $,$ how much work $W_D$ is done by the drag force on the rocket during its ascent?

$W_D=$

J

TOOLS

${10}^y$