Feathers are dropped from a height of 100 metres .........?

Question

Feathers are dropped from a height of 100 metres on the Earth, Mars and Venus.
The surface gravity on the Earth, Venus and Mars are 978, 860 and 378 cm/sec2
respectively. The surface atmospheric pressure on Venus and Mars are 90 times
and 0.01 times that of the Earth respectively. In which order will the feathers
settle on the respective surfaces?
A] Mars – Earth – Venus B] Earth - Venus – Mars
C] Venus – Earth – Mars D] Venus – Mars – Earth

Answer 1

This question is fundamentally flawed, because answers differ depending on whether
1) one takes into account only the variables detailed in the question, or
2) actual conditions on each of the planets.

If one, the answer is C, because with greater gravity and atmospheric pressure, the relative weight of an object (size and shape irelevant) will be greater, creating a faster fall rate. The same applies to the other 2 planets relative to each other.

If atmospheric composition, and the speed and direction of atmosphere are taken into consideration, the answer is none of the above, because exact momentary conditions would need to be predictable, which is improbable. If I had to guess, I'd say mars (with it's thin atmosphere creating little intereference), Earth (with light atmosphere, making a feather heavy relative to it), and venus (with heavy atmosphere and high wind speed), leaving us with answer A.

Answer 2

While you have given some information, some vital details are missing. The type of atmosphere and the convection currents, storms etc. play an important part in the descent of the feather. The buoyancy can be so different on the three planets and so we cannot make any valid statement. If the atmosphere is ignored and only gravity is considered, obviously earth, venus and mars will be the order. Though gravity is less on Mars and atmospheric pressure is also low, huge gales are known to be blowing and in such a situation, the feather may not settle down at any place!

Answer 3

Because of the multiple choice answers, this one is easy. Feathers fall slowly because of air resistance. If you were to drop them in a vacuum they would fall as fast a cannon ball.

Look what you know about Venus: hugely dense atmosphere and gravity slightly less than earth. So Venus must be extremely slow for feathers to settle to the ground.

Look what you know about Mars: no atmosphere and 1/3 the gravity of earth. The feathers should fall pretty fast due to very low air resistance.

Venus must be the slowest and ther is only one answer with Venus in that position. A

Answer 4

hi, im not into phisics & stuff, but the first thing i realised is.
"Feathers are dropped from a height of 100 metres on the Earth, Mars and Venus"

if its 100 metres up u are not ON something.

Answer 5

It relies upon on what point of physics you're taking... An introductory physics path might instruct you that each and every little thing falls on a similar value, yet it is extremely purely genuine in a vacuum. on the earth the ambience creates drag that *does* count on the form, length of the object, and density of the object. The paper might maximum genuinely attain the floor slower than the medium-sized pillow. despite if, in a vacuum, they might attain the floor on a similar time.

Answer 6

a. mars-earth-venus.

Answer 7

think its a