Qualification > Sciences
Physics help!
elemis:
--- Quote from: @d!_†oX!© on August 24, 2010, 09:56:58 am ---so then both are acting as resistive forces, right?
--- End quote ---
From my limited knowledge of A Level Physics :
Upthrust is acting against the weight of an object in water hence I would suspect it is resistive.
I might be wrong. :-\
nid404:
--- Quote from: @d!_†oX!© on August 24, 2010, 09:56:58 am ---so then both are acting as resistive forces, right?
--- End quote ---
Both are resistive forces but their action is in different directions.
@d!_†oX!©:
Alright, I think I should post the complete question itself:
A submarine descends vertically at constant velocity. The three forces acting on the submarine
are viscous drag, upthrust and weight.
Which relationship between their magnitudes is correct?
A weight < drag
B weight = drag
C weight < upthrust
D weight > upthrust
Vin:
I suppose it's D. But the velocity is constant. In the case of D, I'm guessing the velocity would increase. :-\
elemis:
D ?
Because Drag (D) + Upthrust (U) = Weight (W)
Hence B is wrong.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version