Afighterjet is launched from an aircraft carrier with the
aidof its own engines and a steam powered catapult. the thurst of
itsengine2.3*10^5n. in being launched from rest it moves through
adistance 87m and has ke 4.5*10^7j at lift off. what is the work
doneon the jet by the catapult.

Identify two factors that determine the rate of stream erosion

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.