A bird flies 2km to the south, then 0.2km to the north.What is the displacement of the bird ?
2 answers:
Explanation:
It is given that,
A bird flies 2 km to the south, then 0.2 km to the north. The displacement of the bird is equal to the shortest path covered by it.
Initially, the bird is moving in south direction and then it move to north. Displacement can be calculated using difference between initial position and final position.
d = 2.2 km - 0.2 km = 1.8 km
Hence, the displacement of the bird is 1.8 km
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Explanation:
Since, it is given that one hand completes 3.19 vibrations in 8.46 sec. Therefore, in one second the number of vibrations will be as follows.
= 0.377 vibrations
Hence, frequency (f) = 0.38 Hz
Now, formula to calculate the speed is as follows.
v =
or,
=
= 1.57 cm
Thus, we can conclude that the wavelength is 1.57 cm.