Mary travelled 70 miles/hour due north. This is an example of what?
2 answers:
Answer:
velocity.
Explanation:
Velocity is a vector quantity, which consists of:
- a magnitude, which is equal to the ratio between the displacement of an object and the time taken for the displacement to occur:
- a direction, which is equal to the direction of the displacement
In this case, we are given both the magnitude (70 miles/hour) and the direction (north), so this is an example of velocity.
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Lindsay has to fly this plane towards this direction [W 12.5° S] to get to Hamilton.
From this question, the plane is still up in the air.
We have wind blowing in [W 60° N ]
To solve the problem we have to make use of the sine rule
We put the values in the equation, we have:
50/Sinθ = 200/sin60°
The next step is to cross multiply
50 x sin60° = 200Sinθ
50 x 0.8660 = 200sinθ
We make Sin θ the subject
Sine θ = 43.30/200
sine θ = 0.2165
we find the value of θ
θ = sine⁻¹(0.2165)
θ = 12.50
So Lindsay has to fly this plane towards this direction
[W 12.5° S]
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