An airplane flies in a loop (a circular path in a vertical plane) of radius 160 m . The pilot's head always points toward the ce
nter of the loop. The speed of the airplane is not constant; the airplane goes slowest at the top of the loop and fastest at the bottom (a) At the top of the loop, the pilot feels weightless. What is the speed of the airplane at this point?
(b) At the bottom of the loop, the speed of the airplane is 300. What is the apparent weight of the pilot at this point? His true weight is 760 .
By the law of energy conservation, the work done by the student would be the change in potential enegy from 1st floor to 3rd floor, or a change of 13 m
where m = 50kg is the mass of the student, g = 9.8 m/s2 is the gravitational constant and h = 13 m is the height difference
Waves transmit energy without transmitting matter, This means that we can move energy or information from one place to another without moving any substance from one place to another.
