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3 years ago

A hockey player skates with an average speed of 8.25 m/s. The distance the player will travel in 5.60 s is __________ .

Physics

1 answer:

OverLord2011 [107]3 years ago

7 0

<h2>Greetings!</h2>

To find this value, you need to remember the speed formula:

3 = 6 / 2

Speed = distance ÷ time

Rearrange to make distance the subject:

Distance = speed * time

Simply plug these values into this:

5.6 * 8.25 = 46.2

<h3>So the player will travel 46.2 metres!</h3>
<h2>Hope this helps!</h2>

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Mass of the proton, $m=1.67\times 10^{-27}\ kg$

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We need to find the magnetic field strength required to just balance the weight of the proton and keep it moving horizontally.

The Lorentz force is given by :

$F=q(v\times B)=qvB\ sin90$ .............(1)

The weight of proton,

$W=mg$ ..............(2)

From equation (1) and (2), we get :

$mg=qvB$

$B=\dfrac{mg}{qv}$

$B=\dfrac{1.67\times 10^{-27}\ kg\times 9.8\ m/s^2}{1.6\times 10^{-19}\ C\times 4\times 10^6\ m/s}$

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3 years ago