Which of these is an example of a mechanical wave? sunlight light from a flashlight microwaves used to heat food police siren
2 answers:
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Explanation:
Given that,
Weight of the engine used to lift a beam, W = 9800 N
Distance, d = 145 m
Work done by the engine to lift the beam is given by :
W = F d
Let W' is the work must be done to lift it 290 m. It is given by :
Hence, this is the required solution.
Explanation:
Recall the equation for time is distance divided by speed. Here you can use that to solve for "t".
