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September 20, 2014

September 20, 2014

Posted by **elana** on Sunday, October 3, 2010 at 6:33pm.

a. what is the magnitude of the boat's resultant velocity as it crosses the stream?

b. how much time is required for the boat to reach the opposite bank of the stream?

- physics -
**Henry**, Sunday, October 3, 2010 at 9:43pma. X = Hor = 2 m/s

Y = Ver = 1.5 vm/s,

tanA = Y/X = 1.5/2 = 0.75,

A = 36.9 Deg.

R = X / cosA = 2/cos36.9 = 2.5 m/s

= Resulting velocity.

b. d = 30 m / cos36.9 = 37.5 M,

d = v * t,

37.5 = 2.5t,

t = 37.5 / 2.5 = 15 s.

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