the amount of force needed to keep a 0.2 kg hockey puck moving at a constant speed of 8m/s on friction less ice is ____ N

Physics

2 answers:

Art [367]3 years ago

8 0

Answer:

F = 0 N

Explanation:

Given that,

Mass of the hockey puck, m = 0.2 kg

Speed of hockey puck, v = 8 m/s

As the speed is constant. So, there is no change in the velocity. As a result, the acceleration of the hockey puck is 0. Force is given by :

$F=ma$

Since, a = 0

F = 0

So, the amount of force needed to keep a 0.2 kg hockey puck moving at a constant speed of 8 m/s on friction less ice is zero newton.

steposvetlana [31]3 years ago

6 0

If there is really no friction and no air resistance, then <em>NO force</em> is needed to keep an object moving in a straight line at constant speed. Check out Newton's first law of motion again.

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