in the cabin of a jetliner that cruises at 600 km/h, a pillow drops from an overhead rack to your lap below. since the jetliner is moving fast, why doesn't the pillow slam into the rear of the compartment when it drops? what is the horizontal speed of the pillow relative to the ground? relative to you inside the jetlinder?
2007-09-02 18:02:56 · 5 answers · asked by book worm 1 in Science & Mathematics ➔ Physics
(a) Because of the moving inertia (i.e. the pillow is moving with the same speed as the jetliner)
(b) The horizantal speed relative to ground is 600 km/h
(c) 0 km/h
2007-09-02 18:17:40 · answer #1 · answered by mh_mn 2 · 0⤊ 0⤋
Because the air speed is the same inside the jetliner!
The pillow is moving 600km/h relative to the ground....
Relative to you, it is only moving vertically, not horizontally because you and the pillow are going the same speed.
2007-09-02 18:08:08 · answer #2 · answered by Anonymous · 0⤊ 0⤋
By Newton's First Law, all things in motion tend to stay in motion. This is what is meant by inertia.
The pillow is traveling at the same horizontal velocity as the plane so it will remain at the same horizontal velocity during its short free fall.
The pillow is moving with a horizontal velocity of 600 kph with respect to the ground.
2007-09-02 18:31:53 · answer #3 · answered by gebobs 6 · 0⤊ 0⤋
it dosent slam into the back because when the jet took off, it speeds up everything in it (of course), but when the pillow falls it still has all of the jets forward momentum, and theres nothing to change that and make the pillow slow down and go backwards in the jet. im no physics teacher, heck, im not even physics, i probably have this worded wrong, sorry for any confusion.
2007-09-02 18:11:25 · answer #4 · answered by dc_drummer 1 · 0⤊ 0⤋
speed relative to the ground is 600km/hr. speed relative to you is 0km/hr vertical but a=9.8m/s^2 to your lap.
2007-09-02 18:16:58 · answer #5 · answered by tng_2k1 2 · 0⤊ 0⤋