dynamics

Question 1

What is a force?

Answer 1

A push or pull.

Question 2

What are contact forces?

Answer 2

The force that exists within objects that are in contact. Normal reaction force, friction and tension.

Question 3

What are non contact forces?

Answer 3

Does not require objects to be in contact to exist. Gravitational force, magnetic force, electric force

Question 4

What are the effects of forces?

Answer 4

A body at rest moves, a moving body increases in speed, a moving body decreases in speed, a moving body changes direction

Question 5

What are newton’s 3 laws?

Answer 5

1.every object will continue it’s state of rest or uniform motion unless a resultant force acts on it.
2.when a resultant force acts on an object of constant mass, the object will accelerate in the direction of the resultant force. Resultant force is f=ma where mass is in kg and acceleration is m/s^2
3.if body a exerts a force on body b, body b will exert an equal and opposite force on body a

Question 6

What is friction?

Answer 6

The contact force that opposes or tends to oppose motion between surfaces in contact

Question 7

What is friction?

Answer 7

The contact force that opposes or tends to oppose motion between surfaces in contact