Friction and Newton's third law

Question 1

What is frictional directly proportional to?

Answer 1

The normal force

Question 2

The static frictional force can vary depending on how hard you push from ___ (when no other forces are present and the object is ____) to a maximum depends on the surfaces.

Answer 2

Zero

Stationary

Question 3

What happens when the applied force is greater than the maximum, static frictional force?

Answer 3

The object moves.

Question 4

Kinetic friction is smaller in value than the ____ friction and the value remains the same regardless of the magnitude of the applied force.

Answer 4

Static

Question 5

What is important to note for the two forces involved in Newton’s third law? (6)

Answer 5

• The two forces are equal in magnitude
• Opposite in direction
• Act on different objects
• Occur simultaneously
• Act along the same line
• These two forces are called an action-reaction pair of forces