A machine pulls a $50$ kg trunk $2\mathrm{.}4$ m up a $\backslash (38^\{\backslash$circ$\}\backslash )$ ramp at constant velocity, with the machine's force on the trunk directed parallel to the ramp. The coefficient of kinetic friction between the trunk and the ramp is $0\mathrm{.}42.$ What are $($a$)$ the work done on the trunk by the machine's force and $($b$)$ the increase in thermal energy of the trunk and the ramp?

$($a$)$ Number

Units

$($b$)$ Number

Units