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garytse86
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The question is as follow:
A bird is capable of flying at 80km/h. It wishes to fly to its nest which is due East of its present position. Thre is a win blowing from the northwest at 70km/h. Find the direction relative to the air in which the bird must fly to reach its nest.
I tackled the problem like this:
1) Velocity of air = (35root(2))i + (-35root(2))j
Resultant velocity (=velocity of bird) = due east
Velocity of bird relative to air = 80j
Is this correct?
actually I think the method is correct as well, but surely the bird cannot fly just in the north direction (like a helicopter).
Or should I think like this:
2) for i direction: 35root(2) = 80cos(theta) - this gives the right angle tho.
or:
3) for j direction: 35root(2) = 80sin(theta) - I believe this method is correct because you want the resultant direction due east, therefore no j component of the resultant velocity.
Please help.
Gary
A bird is capable of flying at 80km/h. It wishes to fly to its nest which is due East of its present position. Thre is a win blowing from the northwest at 70km/h. Find the direction relative to the air in which the bird must fly to reach its nest.
I tackled the problem like this:
1) Velocity of air = (35root(2))i + (-35root(2))j
Resultant velocity (=velocity of bird) = due east
Velocity of bird relative to air = 80j
Is this correct?
actually I think the method is correct as well, but surely the bird cannot fly just in the north direction (like a helicopter).
Or should I think like this:
2) for i direction: 35root(2) = 80cos(theta) - this gives the right angle tho.
or:
3) for j direction: 35root(2) = 80sin(theta) - I believe this method is correct because you want the resultant direction due east, therefore no j component of the resultant velocity.
Please help.
Gary
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