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iVinArrow [24]
3 years ago
10

Two equal-mass balls swing down and hit identical bricks while traveling at identical speeds. Ball A bounces back, but ball B ju

st stops when it hits the brick. Which ball has a better chance of knocking the brick over
Physics
1 answer:
jekas [21]3 years ago
3 0

Answer:

The right answer is ball b

Explanation:

I hope it is helpful for you

because when ball b knocking bricks over than it will not able to come back

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It has moved a distance, S = 25.9 m

Explanation:

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Equating (1) and (2)

-mv\frac{dv}{dS} = 40 v^2\\\\v\frac{dv}{dS} = \frac{-40 v^2}{m}  \\\\m = 450 kg\\v\frac{dv}{dS} = \frac{-40 v^2}{450}\\\\ \frac{dv}{v} = \frac{40}{450} dS\\

Integrate both sides:

v_1 = 1, v_2 = 10

\int\limits^{10}_1 {\frac{1}{v} } \, dv = \frac{-40}{450}  \int\limits^S_0  \, dS \\\\ln\frac{1}{10} = \frac{-40}{450} (S-0)\\\\S = \frac{-40}{450} ln(0.1)\\\\S = 25.9 m.

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