When you fly in an airplane at night in smooth air, you have no sensation of motion, even though the plane may be moving at 800 km/h (500 mi/h). Why?

Can somebody help me with questions g and h?

A skydiver of mass 70 kg above Earth (g = 10 m/s2) experiences a drag force modeled by -1.2 v (N).  How fast, in m/s, will the skydiver be falling after a long, long time? (Please answer to the fourth decimal place - i.e 14.3225)

1. Can we have a case in which there is no force acting on an object and yet the object is traveling at a constant speed of 1000 mile per second?.,

At one moment aN object in free fall is moving upward with a velocity of 30m/s  . How fast would the object move after five seconds?

When you drop a ball, after 5 seconds it hits the ground.  What is the speed when the moment it touches the ground? Assuming the g=10m/s^2 and ignoring the air resistance. a) 50 m/s b) 0 m/s c) 10 m/s d) 25 m/s

What is the initial velocity of a car that reached 32 m/s [S] in 3.4 s at rate of 2.6 m/s^2 [S]?

A small airplane has an airspeed (speed with respect to air) of 200 km/h. a) Find the time for the airplane to travel 1000 km if there is no wind. b) Find the time for the airplane to travel 1000 km if there is a headwind of 35 km/h. c) Find the time for the airplane to travel 1000 km if there is a tailwind of 35 km/h.

How long (T in seconds) does a force of F=200N need to be applied to a mass of M=10kg, to accelerate it from rest to a final velocity of Vf=30 m/s?

A maglev train massing 1.5sy10? kq coasts up a 3. hill rising at an angle of 15° above The horieontalat an nitial speed Of 360 km/hr gIfthe h no trictiong train is effectively coasting with what is te maximumdir toice it camgoup the hi ll until it stoes? 大aus ' マフ Subua soJt I てプyud n9to Rusogら1 PJOMJO o y the train द force would The y have to exert todo so? how maca