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3 years ago

I need help with 6 and 7

Physics

1 answer:

densk [106]3 years ago

6 0

Explanation:

6. Force = mass × acceleration

F = m Δv / Δt

F = (0.155 kg) (50.0 m/s − (-44.0 m/s)) / (0.00450 s)

F = 3240 N

7. Force = mass × acceleration

F = m Δv / Δt

75 N = (180 kg) (2.0 m/s − 0 m/s) / Δt

Δt = 4.8 s

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Answer:

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t = Time taken

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$39\ ft/s=\frac{39}{3.281}=11.88\ m/s$

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$v^2-u^2=2as\\\Rightarrow a=\frac{v^2-u^2}{2s}\\\Rightarrow a=\frac{11.88^2-0^2}{2\times 7.2}\\\Rightarrow a=9.801\ m/s^2$

Acceleration of the ball is 9.801 m/s²

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3 years ago

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3 years ago

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Explanation:

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Answer:

so i would say 11.4 i dont have work only this link

Explanation:

https://flexbooks.ck12.org/cbook/ck-12-physics-flexbook-2.0/section/11.4/primary/lesson/wave-speed-ms-ps

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