Friction

1. What is friction?

• a. A force that promotes motion

• b. A force that resists the motion of two surfaces

• c. A type of energy

• d. A measure of speed

2. What types of friction are discussed in the video?

• a. Static and dynamic friction

• b. Kinetic and potential friction

• c. Static and kinetic friction

• d. Frictionless and friction

3. Which factor(s) affects the force of friction?

• a. The color of the surfaces

• b. The temperature of the surroundings

• c. The normal force between the surfaces

• d. The size of the object

4. What is the coefficient of friction represented by?

• a. The symbol F

• b. The symbol mu (μ)

• c. The symbol N

• d. The symbol P

What happens to the force of friction when the normal force increases?

• a. It decreases

• b. It remains the same

• c. It increases

• d. It becomes zero

6. Which of the following is true about static friction?

• a. It acts on moving objects

• b. It has no upper limit

• c. It resists the onset of motion

• d. It is always greater than kinetic friction

8. The friction equation for kinetic friction is:

• F_k = μ_k * N
• F_k = μ_k + N
• F_k = μ_k / N
• F_k = μ_s * N

When static friction is exceeded, the object begins to...

If you push with 5 N of applied force, you will get _____ N of friction force?

• 0

• 3

• 10

• 5

• 32.68 N

• 320.3 N

• 824 N

• 842 N