Force of Friction Practice Test

A popular sledding hill has an angle of ![](https://vt-vtwa-assets.varsitytutors.com/vt-vtwa/uploads/formula_image/image/260207/gif.latex $"30^{\circ}$") to the horizontal and has a vertical drop of . If a sledder begins from rest and is traveling at $20 $\frac{m}{s}$$ as they reach the bottom of the hill, what is the coefficient of kinetic friction between the sled and snow?

$g = 10$\frac{m}{s^2}$$

A block of wood with mass 1kg is clamped to a vertical board with a force of 10N. What is the minimum vertical force needed to move the block upward?

$\mu_s=0.15$

$g=10$\frac{m}{s^2}$$

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