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3 years ago

A 1.6 Kg bird that is flying through the air has 220 J of kinetic energy. How fast is the bird flying?

Physics

1 answer:

xxTIMURxx [149]3 years ago

3 0

Answer:

v = 16.58 m/s

Explanation:

Given that,

Mass of a bird, m = 1.6 kg

Kinetic energy of the bird, K = 220 J

We need to find the speed of the bird. The formula for the kinetic energy is given by :

$E=\dfrac{1}{2}mv^2$

Where

v is the speed of the bird

So,

$v=\sqrt{\dfrac{2E}{m}}$

Put all the values,

$v=\sqrt{\dfrac{2\times 220}{1.6}}\\\\v=16.58\ m/s$

So, the speed of the bird is equal to 16.58 m/s.

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A spinning wheel has a rotational inertia of 2 kg•m². It has an angular velocity of 6.0 rad/s. An average counterclockwise torqu

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As a result, the final angular velocity of the wheel will be:

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$\omega_f = +6.0 +(-2.5)(4.0)=-4 rad/s$

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