Mini-Quiz: Normal Force in Rolling Friction

1. What is the normal force of a wheel on an incline?

   The weight of the wheelSorry, not correct. Try another button. The angle of the incline times its cosineGood try, but not right. Select another answer. The weight of the wheel times the cosine of the angleThat is correct. You are a Champion in rolling friction.

2. What is the normal force on the ground from a wheel and axle on a cart?

   The weight of the wheel plus that or the cartCorrect. You are doing great! The weight of the axle and the cartOops! Wrong answer. Re-read the question and try again. The weight of the wheel minus that of the cartSorry, not correct. Try another button.

3. What is the normal force on the top of rollers between two objects?

   The weight of the rollerOops! Wrong answer. Re-read the question and try again. The weight of the top object plus that of the rollersGood try, but not right. Select another answer. The weight of the top objectThat is correct. You are a Champion in rolling friction.

Pick an answer to see instant feedback. Re-read the lesson if you miss one.