Aboeing 777 lands at chicago o'hare airport (668 m elevation) where the pressure is 98.8 kpa. this 777 wing has a coefficient of lift of 1.46, and its wing area is 4618.8 ft2 (this needs to be converted into m2). when the plane left st. louis, its mass was 225,982 kg. note that kilograms is mass not weight, so you need to convert it. during the flight to chicago, 7,534 liters of fuel was used, where the jet fuel weighs 0.781 kg/l. what is the velocity in miles-per-hour at the point where the aircraft initially touches the ground?

Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.

Where do magnetic lines of force enter earth?

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".