Friction Coefficient.

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Presentation transcript:

Friction Coefficient

Warm-up A sled is being dragged down the road by a man. He is pulling on a rope with 30N of force horizontally. The sled exerts 5N of frictional force on the road. What is the net force the sled is being dragged. b)What is the acceleration of the system?

What does friction rely on? What makes it change?

To calculate the friction force you do the friction coefficient( ) times the normal force.

a) How much force is being exerted by friction. A 15kg box is being slid across a floor. The coefficient of friction with the box and floor is .2 a) How much force is being exerted by friction. b) If the box is being pulled with 120N of force. What is the acceleration of the box?

a) What is the friction force? A 20N sled is being pulled by dogs across the snow. The coefficient of friction is .15 a) What is the friction force? b) If the net force acting on the sled is 60N. How much force did the dogs apply to the sled?

Write an equation for the acceleration of the box. This guy is dragging a box to the right with a force 𝐹 𝑥 and the kinetic friction coefficient is 𝜇 𝑥 and the box has a mass of 𝑚 1 . Write an equation to represent the net force. Write an equation for the acceleration of the box.