The time for a boat to cross a river is dependent upon the _________ of the boat. The current velocity has no effect upon the ________ required for a boat to cross a river.

a.
velocity, time
c.
angle of the current and the mass, acceleration
b.
current velocity and the speed, displacement
d.
None of the above.

Question

The time for a boat to cross a river is dependent upon the _________ of the boat. The current velocity has no effect upon the ________ required for a boat to cross a river.

a.
velocity, time
c.
angle of the current  and the mass, acceleration
b.
current velocity and the speed, displacement
d.
None of the above.

anonymous · Answer

@OOOPS @Orion1213 @tHe_FiZiCx99 @tester97 @robtobey @adrynicoleb @pencil46  @Official_Hotboy

adrynicoleb · Answer

I don't know anything about physics...Sorry >.<

anonymous · Answer

It's okay, thanks though!

anonymous · Answer

From Physics, if the river's current velocity as well as boat's velocity are constant then the resultant velocity will be considered, and the time t can be determined using...
$$t = \frac {d}{V}$$where d is the displacement traveled by the boat in crossing the river, and V is the resultant velocity of both current and boat...

anonymous · Answer

|dw:1405645419361:dw|
from this typical figure... line AB is supposed to be the displacement traveled by the boat in still water (no current in the river), the only velocity present is of the boat... but if there is current velocity... the resulting displacement will be line AC... and so time is affected by current velocity and speed of the boat... the current velocity since a component of the resultant velocity has an effect of course to the displacement... it will take more time for the boat to cross the river thus a longer displacement will be made... so I can say "None of the above"