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elena-s [515]
3 years ago
5

You run completely around a 400m track in 80s. What was your average velocity?

Physics
1 answer:
dalvyx [7]3 years ago
6 0

Answer:

V=?

S=400m

t=80s

V=S/t

V=400/80

V=5m/sec

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A mass of 150 g stretches a spring 1.568 cm. If the mass is set in motion from its equilibrium position with a downward velocity
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u(t)=\frac{1}{5} sin\ (25t)

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  • mass of the body stretching the spring, m=150\ g
  • extension in spring, \Delta x=1.568\ cm
  • velocity of oscillation, u'(0)=20\ cm.s^{-1}
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<u>According to given:</u>

m.g=k.\Delta x

150\times 980=k\times 1.568

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u= A.sin\ (\omega.t)+B.cos\ (\omega.t)

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u(t)=\frac{1}{5} sin\ (25t)

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