A van is traveling on a road at a speed of 55 km/h. A girl sitting near the driver of the van throws a paper airplane to a boy a
2 answers:
Answer:
53 km/h
Explanation:
Let's take as positive direction the direction in which the van is moving. In this case, we can write as follows:
- Velocity of the van relative to the road:
- Velocity of the paper airplane relative to the van: (with a negative sign since it is moving into opposite direction)
Therefore, the velocity of the paper airplane relative to the road (stationary observer) will be
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Answer:
Please check the attached file for the diagram
Explanation:
The velocity of the of the rowboat through the river is the resultant velocity. It is obtained taking a vector sum of the velocity in still water and the velocity of the river.
There are several ways to take this vector sum, but the question makes it simple for us to use Pythagoras's theorem because the East and North directions are perpendicular to each other.
Hence;
