Aperson is standing on a stool inside a dumbwaiter, which is moving downward and slowing down. the personâs inertia is 20kg and the stool has an inertia of 10kg. the dumbwaiter itself has an inertia of 40kg. (a) draw a free-body diagram for the dumbwaiter
(b) draw a free-body diagram for the stool
(c) draw a free-body diagram for the person.
(d) does the person feel lighter or heavier at this point? explain your answer.

Suppose water is leaking from a tank through a circular hole of area ah at its bottom. when water leaks through a hole, friction and contraction of the stream near the hole reduce the volume of water leaving the tank per second to cah 2gh , where c (0 < c < 1) is an empirical constant. a tank in the form of a right-circular cone standing on end, vertex down, is leaking water through a circular hole in its bottom. (assume the removed apex of the cone is of negligible height and volume.) (a) suppose the tank is 20 feet high and has radius 8 feet and the circular hole has radius 2 inches. the differential equation governing the height h in feet of water leaking from a tank after t seconds is dh dt = − 5 6h3/2 . if the height of the water is initially 8 feet, how long will it take the tank to empty? (round your answer to two decimal places.)

The slope of a velocity time graph over any interval of time gives the during that interval

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?