Module 3—Effects of Force on Velocity
Friction
Friction is the force that opposes the relative motion, or tendency of such motion, of two surfaces that are in contact. For example, there is friction between the wheels of a train and the track they are in contact with. The friction opposes the motion of the train, and work must be done to overcome the force of friction.
Watch and Listen
Work through the Coefficient of Friction tutorial. This tutorial will help you understand how the force of friction is generated and how it contributes to the net force acting on an object. Click the right arrow in the bottom right-hand corner to progress to the next screen when you are ready.
- Page 1: You will be presented with a question and a white answer box. Click in the box, type the numerical value of your answer, and select Enter on your keyboard. Repeat for the next question posed.
- Page 2: Run the animation before you try to place the weight arrow.
- Page 4: Run the animation before you try to place the weight arrow.
- Page 5: If you choose the wrong surface, you get a red X. Go back one screen, and try again.