Mass Vs. Air Resistance

[peacefulheart]

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Two balls with exactly the same size and shape are launched with the same initial velocity from the surface of a perfectly flat plane. When air resistance considered, the ball with the greater mass will have a :

A longer flight time and a greater maximum height

B.longer ................. and a lower ..........................

C shorter ...............and a greater...............,,,,,,,,,,,,,,
D shorter ...............and a lower........................

Could anybody please explain what is the relationship between mass and air resistance. thanks

 

[Hanguk]

Err....I guess I would use intuition. Is the answer D by chance?

 

[BB8730]

Could anybody please explain what is the relationship between mass and air resistance. thanks

Mass has nothing to do with air resistance. The amount of air resistance depends on the cross sectional area and the speed of an object.

Edit: see below

 

[dmf2682]

Suggest you guys focus on momentum and inertia.

 

[peacefulheart]

sorry, I forgot to put the answer. The answer is A.

 

[BB8730]

Suggest you guys focus on momentum and inertia.

Yeah sorry my previous explanation was crappy. Since both objects start at the same velocity, the inertia of the more massive object will render it less susceptible to the change in motion due to the air resistance, making it fly longer and higher.