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A hockey puck with a mass of 160 g is sliding across an empty ice rink. The coefficient of friction between the hockey puck and the ice is 0. 51. The puck travels 47. 7 m before coasting to a stop. What was the initial velocity of the puck?.

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pstnonsonjoku

The initial velocity of the hockey puck is obtained as 22 m/s.

What is the frictional force?

The frictional force of the hockey puck is the force that causes it to stop. Now;

Ff = μmg

Ff = 0. 51 * 0.16 Kg * 9.8 m/s^2

Ff = 0.8 N

Now;

F = mv^2/2x

Where;

m = mass

v = velocity

x = distance

v =√ 2xF/m

v = √ 2 * 47.7 * 0.8 / 0.16

v = 22 m/s

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