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The graph shows the friction on a block against the push applied to it…

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Try it on paper first. A hint, the key idea and the worked solution are here when you need them.

The graph shows the friction on a block against the push applied to it. The block has a mass of $2.5\ \text{kg}$ and rests on a level floor. Taking $g = 9.8\ \text{m/s}^2$ , find the coefficients of static and kinetic friction.

A graph of the friction force against the applied force. A blue straight line rises at 45 degrees from the origin to 10 newtons at an applied force of 10 newtons, which is the largest static friction. At that point the friction force drops to 7 newtons, and an orange horizontal line at 7 newtons continues to the right, for kinetic friction while the block slides.

Need a reminder? The key ideaShow

The worked solution

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Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.

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