First slide

Motion in a plane

Question

To go from town A to town B a plane must fly about 1780 km at an angle of 30^o West of North. How far north of A is B ?

Moderate

A

1542 km
B

1452 km
C

1254 km
D

11 km

Solution

AC = AB cos30⁰= 1780 x $\frac{{\sqrt 3 }}{2}$ km
= 1542 km

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