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Sever21 [200]
3 years ago
10

What is an astronomer? Answer in the simpliest way please.

Physics
1 answer:
Sphinxa [80]3 years ago
8 0
They would be an expert in astronomy
astronomy:the branch of science that deals with celestial objects
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Force F=2.0N i - 3.0N k acts on a pebble with position vectorr=0.50m j - 2.0m k relative to the origin. In unit vector notation,
klasskru [66]

Answer with Explanation:

We are given that

Force acts on a pebble=2\hat{i}-3\hat{k} N

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a.We have to find the resulting torque on the pebble about origin.

Torque=r\times F

Substitute the values then we get

Torque= (0.5j-2k)\times (2i-3k)

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b.r=2i-3k

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Torque about point (2,0,-3)

\tau=(-2i+0.5j+k)\times (2i-3k)

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