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Studentka2010 [4]
3 years ago
11

Newton’s second law of motion can also be described as _____.

Physics
1 answer:
anzhelika [568]3 years ago
3 0

Answer:

F=ma

Explanation:

The Newton's laws of motion tries to explain the how bodies behave and the energy changes when theys are in motion. For the 3 of them to hold, the bodies must be moving in a straight line and with constant velocity.

The second one states that, "the change of momentum of a moving body is directly proportional to the force producing it and it takes place to the direction of force."

From the choices given, the appropriate answer is F=ma

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3 years ago
A wheel rotates with a constant angular acceleration of  rad/s2. During a certain time interval its angular displacement is  r
Hatshy [7]

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The angular velocity at the beginning of the interval is \pi\sqrt{2}\ rad/s.

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Given that,

Angular acceleration \alpha=\pi\ rad/s^2

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Angular velocity \omega =2\pi\ rad/s

We need to calculate the angular velocity at the beginning

Using formula of angular velocity

\alpha =\dfrac{\omega^2-\omega_{0}^2}{2\theta}

\omega_{0}^2=\omega^2-2\alpha\theta

Where, \alpha = angular acceleration

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\omega_{0}^2=(2\pi)^2-2\times\pi\times\pi

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\omega_{0}=\pi\sqrt{2}\ rad/s

Hence, The angular velocity at the beginning of the interval is \pi\sqrt{2}\ rad/s.

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