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3 years ago

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An oscillating block-spring system has a mechanical energy of 4.72 J, an amplitude of 11.2 cm, and a maximum speed of 4.24 m/s.

Find (a) the spring constant, (b) the mass of the block and (c) the frequency of oscillation.

1 answer:

dsp733 years ago

7 0

Answer:

anyone know this or should i get my brother

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Which is an example of a chemical change?

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Answer:

69.66 Joule

Explanation:

mass of bicycle frame, mf = 8.29 kg

mass of wheel, mw = 0.820 kg

radius, r = 0.343 m

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There are two wheels in the bicycle.

There are two types of kinetic energy of the system one is kinetic energy of rotation and another is rotational kinetic energy.

$K = \frac{1}{2}m_{f}v^{2}+ 2\times \frac{1}{2}m_{w}v^{2}+ 2\times \frac{1}{2}I_{w}\omega^{2}$

$K = \frac{1}{2}m_{f}v^{2}+m_{w}v^{2}+ \frac{1}{2}\times m_{w}v^{2}$

$K = \frac{1}{2}m_{f}v^{2}+ \frac{3}{2}\times m_{w}v^{2}$

$K = \frac{1}{2}\times 8.29\times 3.6^{2}+ \frac{3}{2}\times 0.820\times 3.6^{2}$

K = 69.66 J

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A student walks downstairs to class. Which statement correctly describes the types of energy the student has at the top of the s

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D potential energy at the top of the stairs, kinetic energy as she walks down

Explanation:

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At the top of the stair case, the student is at a significant height.

Kinetic energy is the energy due to the motion of the body.

As the student descends, the potential energy is changed to kinetic energy.

To find the potential energy;

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g is the acceleration due to gravity

H is the height of the body

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v is the velocity

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Answer:

<em>P=mgh</em>

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Explanation:

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