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qazxsw11111
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[NEED HELP+DIAGRAM INCLUDED]Question about Air Resistance
http://img410.imageshack.us/img410/3732/airr.jpg
Red line- No air resistance
Blue line-Air resistance present
Ok, so I thought on the way UP, resistive forces (oppose motion) acts in same way as g-force => Deceleration is very large. Time taken is very short.
On the way down, air resistance acts in opposite to g-force, resultant force and acceleration are smaller. Time is much longer.
I thought it was B since the a is smaller. (Longer time)
But the answer suggested that the first is correct.
Reasoning given by answer (Im still confused):
Air resistance opposes motion and decreases both vertical and horizontal velocity=>Lower vertical height and shorter horizontal range [OK, I get this]
The path of A after maximum height is progressively steeper due to the diminishing magnitude of horizontal velocity.
It makes sense also but I wonder why am I wrong? Can anyone help clarify this?
Thanks.
http://img410.imageshack.us/img410/3732/airr.jpg
Red line- No air resistance
Blue line-Air resistance present
Ok, so I thought on the way UP, resistive forces (oppose motion) acts in same way as g-force => Deceleration is very large. Time taken is very short.
On the way down, air resistance acts in opposite to g-force, resultant force and acceleration are smaller. Time is much longer.
I thought it was B since the a is smaller. (Longer time)
But the answer suggested that the first is correct.
Reasoning given by answer (Im still confused):
Air resistance opposes motion and decreases both vertical and horizontal velocity=>Lower vertical height and shorter horizontal range [OK, I get this]
The path of A after maximum height is progressively steeper due to the diminishing magnitude of horizontal velocity.
It makes sense also but I wonder why am I wrong? Can anyone help clarify this?
Thanks.
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