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March 30, 2024, 12:59:55 am

Author Topic: MORE TRIG HELP! Bearings  (Read 929 times)  Share 

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chuckjefster90

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MORE TRIG HELP! Bearings
« on: July 22, 2010, 06:17:10 pm »
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Please help guys :(
Some bearing problems! If you could draw on paint or something that would be awesome!

1a) A man is standing on top of a buiilding watching a bike travelling towards him. If the angle of depression from the man to the bike is 25°15' when the bike is 80m away, find the distance of his line of sight to the bike.
1b) Ten seconds later the angle of depression is 30°. Find the speed of the bike to the nearest metre per second.
Answer 1a) 88.45m    1b) 2m/s

2)Nicole walks due east for 300m then due south for 400m, while Luke walks due west for 500m the north for 700m. If they both start from the same position at the same time find:
a) The bearing of Nicole from Luke
b) Their final distance apart
Answer6a) S36°E  6b) 1360 m

3) Kellie walks north for 8km then west for 3km. What is her conventional(compass) bearing from her starting point?
Answer: 3) N21°W

4)A car travels south from point A for 120 km and then west for x km. If the bearing of the car from A is S30°W, fid the value of x to the nearest km.
Answer x = 69km

5) A train travels due east from Dalton for 5km then due north for 7.5 km to Eaglevale.
a) What is the bearing of the Eaglevale from Dalton?
b) The tram travels from Eaglevale due east for 7.2 km and then due south for 2.4 km to Frenchmore. Find the bearing of Frenchmore from Dalton?
c) What is the distance from Frenchmore to Dalton?
Answer 5a) N34°E, 34°T        b) N67°E, 67°T          c) 13.2 km

6) A boat travels N50°E for 12km, then turns due north for further 10km
a) Find the distance of the boat from its starting point
b) Find the final bearing of the boat from its starting point.
Answer 6a)  S36°E         b) 136m

THIS WILL BE VERY APPRECIATED! IM SO SORRY FOR ASKING FOR A LOT! JUST STRUGGLING!