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1. ### A hiker makes 20 km in 5 hours and then gets a ride by a car for another 10 km at a speed of 80 km/h. Find the average speed for the trip.?

AVERAGE SPEED = TOTAL DISTANCE / TOTAL TIME Distance = 20+10 = 30 km Time = 5 + 10/80 = 5 1/8 hours AVERAGE SPEED = 30 / 41/8 = 240 /41 = 5.85 km/ hour ANSWER

1 Answers · Science & Mathematics · 19/05/2014

alright I assume you're smart enough to figure out where he got to by just adding the distances, the only hard part is figuring out how far from the original place he is. so lets say he ends up at (x,y) (he actually ends up at (-3,4) if you consider east...

2 Answers · Science & Mathematics · 30/09/2009

3. ### physics help?

...5 Use any trig function ex. sinΘ=opp/adj.... anyways the hiker needs to travesl 5 km at 30 degrees SE

2 Answers · Science & Mathematics · 28/01/2008

4. ### i do not understand this at all help needed!!!!?

add up the amount on the N/S axis and the amount on the E/W axis. then use geometry to answer the questions. also, you could draw it on graph paper if that helps you see it better.

4 Answers · Science & Mathematics · 19/06/2008

5. ### physics help?

The best thing to do is to get squared paper and draw it out. Start with one point as 'camp' and draw a line 4 squares to the left, then 6 squares down etc. When you finish the diagram draw a line from the last point to your first...

3 Answers · Science & Mathematics · 08/06/2008

6. ### plz help me with physics Kinematics velocity vector?

(1) Your velocity relative to the shore is 5.0 + 2.0 km / h = 7.0 km/h. (2) Use the Pythagorean Theorem to compute the hypotenuse magnitude and angle. (3) Ditto. (4) Add the vectors, head to tail, then compute the resultant. The answer is...

1 Answers · Science & Mathematics · 08/07/2008

7. ### i need someone to help explain some physics problems?

1) To add two vectors, use the law of cosines: C = sqrt (A^2 + B^2 + 2AB cos theta) 2) Add up the x (east is positive) and y (north is positive) components. Use pythagorus to get the magnitude (you already...

2 Answers · Science & Mathematics · 05/06/2010

8. ### physics question?

Total distance E is: 4 + 3 - 9 = - 2 km. Total distance N is: - 6 + 5 + 12 - 3 = 8 km. Distance from camp = sqrt(8^2 + 2^2) = sqrt(68) = 8.25 km. If t is the required angle: tan(t) = - 8 / 2 As the distance is...

1 Answers · Science & Mathematics · 09/06/2008

9. ### help with physics!?!?!?!?

1. East = 4km + 3km = 7km West = 14km 14km - 7km = 7 km west South = 6km + 3km = 9 km North = 5 km + 9 km = 14km 14 km - 7 km = 7km north displacement from the camp = sqrt[7^2 + 7^2] displacement from the camp = 9.9 km ANSWER tan θ = 7/7 θ...

1 Answers · Science & Mathematics · 16/06/2008