Homework Help: physics

Posted by Emily on Tuesday, September 4, 2012 at 8:30am.

A viking sails from his home port and travels east at 15km/hr.after 10 hours, the wind change and he is blown south west at 20km/hr for six hours.at his point wind drops, the ship is becalmed and doesnot move for the next ten hours.becoming tired of waiting,the viking order his crew to start rowing west at 10km/hr which they do for five very tiring hours before beaching the ship on a convenient island. calculate the average velocity and average speed of the ship from when its left port to when it was beached.

physics - RABIUL, Tuesday, September 4, 2012 at 9:52am
5KM/H
physics - Hayley, Wednesday, September 5, 2012 at 10:54am
average speed is 10.3kmh

15km/h for ten hours is 150km
20km/h for 6 hours is 120km
10km/h for 5 hours is 50km
10hrs at rest
150+120+50=320km in 31hrs
Speed average=total distance travelled/time taken
320/31= Average speed of the ship is 10.3km/h

currently trying to work out the displacement to work out the average velocity cause v=d/t we already have time

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