A $1500-$kg elevator is lifted up $40\mathrm{.}0$ m by a cable at constant velocity. There is friction with magnitude

of $100$ N acting on the elevator.

a$)$ Draw free$-$body diagram of the elevator

b$)$ Calculate the work done by the gravitational force during the process

$3$ Name:..............................................

c$)$ What is the work done by friction?

d$)$ Find the work done by tension force of the cable

e$)$ What is the net work?