3 years ago

4. Head injury- A friend is running in the farm and trips over a hose. They hit their head really

1 answer:

4 0

Look for blood, make sure they’re conscious, if not call 911 ofc.

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Sever21 [200]

Answer:

$\omega = 0.16 s^{-1}$

Explanation:

As we know that there is no torque on the system of merry go round

so the angular momentum will remain conserved

so here we have

$I_1\omega_0 = (I_1 + I_2)\omega$

so we will have

$I_1 = 500 kg m^2$

$I_2 = 30(2.1^2)$

$I_2 = 132.3 kg m^2$

$\omega_0 = 0.20 s^{-1}$

now from above formula

$500(0.20) = (500 + 132.3)\omega$

$\omega = 0.16 s^{-1}$

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Svet_ta [14]

KE = (1/2) (mass) (speed)²

KE = (1/2) (20 kg) (40 m/s)²

KE = (1/2) (20 kg) (1,600 m²/s²)

KE = (10 kg) (1,600 m²/s²)

KE = 16,000 Joules

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