A luggage handler pulls a 15 kg suitcase up a ramp inclined at an angle 30⁰ above the horizontal by a horizontal force F of magnitude 180 N. The coefficient of kinetic friction between the ramp and the suitcase is 0.25. If the suitcase travels 1.9 m along the ramp, calculate (a) The work done on the suitcase by F (b) The work done on the suitcase by gravity (c) The work done on the suitcase by friction (d) The work done on the suitcase by normal force (e) If the package started from rest, what is its speed after it has travelled 1.9 m?

On a hot saturday morning while people are working inside, the air conditioner keeps the temperature inside the building at 22degreesc. at noon the air conditioner is turned off, and the people go home. the temperature outside is a constant 33degreesc for the rest of the afternoon. if the time constant for the building is 4 hr, what will be the temperature inside the building at 4 : 00 font size decreased by 2 upper p . font size decreased by 2 upper m .? at 6 : 00 font size decreased by 2 upper p . font size decreased by 2 upper m .? when will the temperature inside the building reach 24degreesc? 324281