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3 years ago

15

What 7a=56 and what's the answers

2 answers:

WINSTONCH [101]3 years ago

7 0

A=8 because you divide 56 by 7

SIZIF [17.4K]3 years ago

3 0

A = 8 because
7 times 8 equals 56
and
56 divided by 7 equals 8

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A playground merry-go-round of radius R = 1.80 m has a moment of inertia I = 255 kg · m2 and is rotating at 9.0 rev/min about a

Degger [83]

Answer:

7 rpm = 0.73 rad/s

Step-by-step explanation:

R = Radius of merry-go-round = 1.8 m

$I_M$ = Moment of inertia of merry-go-round = 255 kg m²

$I_C$ = Moment of inertia of child

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m = Mass of child = 24 kg

From the conservation of angular momentum

$I\omega=I'\omega '\\\Rightarrow I\omega=(I_M+I_C)\omega'\\\Rightarrow \omega'= \frac{I\omega}{(I_M+I_C)}\\\Rightarrow \omega'=\frac{I\omega}{(I_M+mR^2)}\\\Rightarrow \omega'=\frac{255\times 9}{(255+24\times 1.8^2)}\\\Rightarrow \omega'=6.9\ rev/min$

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4 years ago

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aleksklad [387]

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Step-by-step explanation:

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3 years ago

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Step-by-step explanation:

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