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12345 [234]
3 years ago
11

Anyone know these questions?

Physics
1 answer:
salantis [7]3 years ago
7 0
400m in 32sec: (400/32)>12.5meters per second>
(12.5)(60)(60)(1/1000)=45km per hour
Constant speed would mean that the two forces are equivalent
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A 4.3-kg block slides down an inclined plane that makes an angle of 30° with the horizontal. Starting from rest, the block slide
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Answer:

0.56

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m = 4.3 kg, θ = 30 degree, initial velocity, u = 0, s = 2.7 m, t = 5.8 s

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Fnet = mg Sinθ - f = 4.3 x 9.8 x Sin 30 - 36.49 μ

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μ = 0.56

8 0
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