Chapter 4

Question 1

Force

Answer 1

-Something that is capable of changing an objects state of motion (velocity)

Question 2

Free-Body Diagram

Answer 2

-Used to analyze only the forces affecting the motion of a single object

Question 3

Newton’s First Law of Motion

Answer 3

• Inertia
• An object at rest will stay at rest unless acted upon by an unbalanced force
• An object in motion will stay in motion with a constant speed and direction unless acted upon by an unbalanced force
• Ex: soccer ball being kicked

Question 4

Newton’s Second Law of Motion

Answer 4

• The acceleration of an object is:
  
  • Directly proportional to the net force acting upon it
  • Inversely proportional to its mass
• Fnet=ma
• Ex:use a certain acceleration and apply the properties to it

Question 5

Newton’s Third Law of Motion

Answer 5

-For every force (action), their is an equal and opposite force (reaction)
Ex: sitting in a chair

Question 6

Net Force

Answer 6

• The vector sum of all the forces acting on an object
• Equals 0: balanced
• Nonzero: unbalanced