P4.2

Question 1

1. Where does a force arise from?

Answer 1

-an interaction between two objects

Question 2

2. What is an interaction pair?

Answer 2

-when two objects interact, both always experience a force and that these two forces form an interaction pair

Question 3

4. What are the sizes and directions of the two forces in an interaction pair? What objects do they act on?

Answer 3

• equal in size
• opposite in direction
• act on different objects

Question 4

5. What is friction?

Answer 4

Friction is when each surface sliding past each other experiences a force in the direction that prevents the movement.

Question 5

6. What happens in the interaction between an object and a horizontal surface it is resting on?

Answer 5

• the object pushes down on the surface

- the surface pushes up on the object with an equal force

Question 6

6. What is the upwards force called in the interaction between an object and a horizontal surface it is resting on?

Answer 6

-the reaction force (reaction of the surface)

Question 7

7. When do friction and the reaction of a surface (reaction force) arise?

Answer 7

-in response to the action of an applied force

Question 8

7. What size is the friction and the reaction of a surface (reaction force) in comparison to the applied force?

Answer 8

-their size matches the applied force up to a limit (then the object with the applied force moves)