4.5.6.2.3 Newton’s Third Law

Question 1

Newton’s Third Law:

Answer 1

whenever two objects interact, the forces they exert on each other are equal and opposite

Question 2

Example of free body diagram that isn’t a Newton’s Third Law paid:

Answer 2

Question 3

Examples of a Newton’s Third Law pairs: Ball on a table

Answer 3

force of the ball on the table + force of the table on the ball

Question 4

Examples of a Newton’s Third Law pairs: Walking

Answer 4

• push of feet on the ground
• push of ground on feet

Question 5

Examples of a Newton’s Third Law pairs: Earth and a ball

Answer 5

Question 6

Examples of a Newton’s Third Law pairs: Book on a table

Answer 6

Question 7

Is it Newton’s 3rd Law Clues:

Answer 7

• we consider “two objects”
• forces are equal in magnitude (also applies to balanced forces)
• the forces are opposite in direction (also applies to balanced forces)
• forces are the same type of force
• forces for Newton’s Third Law come in pairs - consider two objects
• free body diagram focuses on just one object

Question 8

If the force on the horse and the carriage is equal how can the horse pull the carriage forward?

Answer 8

the carriage has wheels which means there’s less friction on the ground whereas there is friction on the horses hooves which provide it with a push as it will have an equal and opposite force acting against the friction of the ground