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Nikolay [14]
3 years ago
6

A 0.171-kilogram hockey puck is struck by a hockey stick. If the force from the hockey stick is 30.2 Newtons, but the puck also

experiences a force of friction of 3.5 Newtons at the same time, what is the acceleration of the puck?
Physics
1 answer:
Komok [63]3 years ago
4 0

Answer:

a = 156.14 m/s^2

Explanation:

Using the laws of newton:

∑F = ma  

where ∑F is the sumatory of forces, m the mass and a the aceleration.

so:

F -f_k = ma

where F is the force from the hockey stick and f_k is the force of friction.

Replacing values, we get:

(30.2N) - (3.5N)= (0.171kg)a

Finally, solving for a:

a = 156.14 m/s^2

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Divided equation (II) by (I)

\dfrac{f'}{f}=\dfrac{n_{g}-n_{a}}{n_{g}-n_{ethyl}}

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n_{a} = refractive index of air

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Put the value into the formula

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f'=\dfrac{25}{7}\times11.5

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