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emmainna [20.7K]
3 years ago
7

Lifeguards love to spin their whistles. Describe this motion and explain it using angular momentum terminology. Also, please use

complete sentences.

Physics
1 answer:
Dahasolnce [82]3 years ago
4 0

Explanation:

The angular momentum is defined as the product of the moment of inertia of the body and the angular velocity of the object.

In the given problem, Lifeguards love to spin their whistles. The person spins the whistle about  fixed axis by using his fingers.

In this case, the whistle is moving about the fixed axis with the angular velocity. Then there will be angular momentum.

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A particle with charge 7.76×10^(−8)C is moving in a region where there is a uniform 0.700 T magnetic field in the +x-direction.
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Answer:

The  z-component of the force is  \= F_z  =  0.00141 \ N    

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From the question we are told that

          The charge on the particle is q =  7.76 *0^{-8} \  C    

           The magnitude of the magnetic field is  B =  0.700\r i \ T

            The  velocity of the particle toward the x-direction is  v_x  =  -1.68*10^{4}\r  i  \ m/s

           The  velocity of the particle toward the y-direction is

v_y  =  -2.61*10^{4}\ \r j  \ m/s

           The  velocity of the particle toward the z-direction is

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Generally the force on this particle is mathematically represented as

          \= F  =  q (\= v   X  \= B )

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          \= F  =  q ( v_x \r  i + v_y \r  j  +  v_z \r k  )  \ \ X \ (  \= B i)

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      \= F=  0.00303\ \r j +0.00141\ \r k                  

So the z-component of the force is  \= F_z  =  0.00141 \ N    

Note :  The  cross-multiplication template of unit vectors is  shown on the first uploaded image  ( From Wikibooks ).

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