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3 years ago

Trigonometry Help, question posted below @AL2006

Physics

1 answer:

Oxana [17]3 years ago

8 0

It's ' D '.

-- Period: The angle is (pi/2 · t).
From t=0 to t=4 sec, the angle changes by 2pi. So the period is 4 sec.

-- Amplitude: The biggest the cosine can ever be is 1 .
When the cosine part is 1, 'd' is 6, so the amplitude of the model is 6 .

-- Position when t=0:
When t=0, the angle in the cosine is zero.
The cosine of zero is 1 .
So when t=0, d=6 . There you are.

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Nitella [24]

F = 52000 N

m = 1060 kg

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3 years ago

Automobiles must be able to sustain a frontal impacl The automobile design must allow low speed impacts with little sustained da

valentinak56 [21]

Answer: the effective design stiffness required to limit the bumper maximum deflection during impact to 4 cm is 3906250 N/m

Explanation:

Given that;

mass of vehicle m = 1000 kg

for a low speed test; V = 2.5 m/s

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First we determine the energy of the vehicle just prior to impact;

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now, the the effective design stiffness k will be:

at the impact point, energy of the vehicle converts to elastic potential energy of the bumper;

hence;

W_v = 1/2kx²

we substitute

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2 years ago

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3 years ago

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ELEN [110]

Answer:

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2 years ago

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Fynjy0 [20]

Answer:

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$\omega_f$ = Final angular speed

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$I_i=I+2mr^2$

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2 years ago