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lbvjy [14]
3 years ago
5

A 15 kg box sits still on a rough inclined plane (no math required here).

Physics
1 answer:
nexus9112 [7]3 years ago
3 0

Answer:

Explanation:

The force of friction equals the sine component of the force due to gravity

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Part complete How long must a simple pendulum be if it is to make exactly one swing per five seconds?
shtirl [24]

Answer:

L=6.21m

Explanation:

For the simple pendulum problem we need to remember that:

\frac{d^{2}\theta}{dt^{2}}+\frac{g}{L}sin(\theta)=0,

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\omega^{2}=\frac{g}{L},

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There is also an equation that relates the oscillation period and the angular frequeny:

\omega=\frac{2\pi}{T},

where T is the oscillation period. Now, we can easily solve for L:

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tigry1 [53]

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