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sleet_krkn [62]
3 years ago
8

A man has a power of 90 W and mass 60 kg runs up a staircase in 40 s. If each staircase is 20cm high find the number of steps? (

grade 9 physics-GRAVITATION)
Physics
1 answer:
Svetlanka [38]3 years ago
4 0
I depends on three area of the staircase
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