Week 3 Newton's Laws

Question 1

what are the two types of forces

Answer 1

contact forces

long range/ non contact forces

Question 2

define Newton’s first law

Answer 2

Every object continues in its state of rest or uniform motion in a straight line unless acted upon by a resultant force

Question 3

what is inertia

Answer 3

resistance of an object to a change in its state of motion

Question 4

what is used to quantify inertia

Answer 4

mass

Question 5

how do you test if you are in an inertial reference frame and what is the result if you are in an inertial frame

Answer 5

release an object so that it becomes an isolated body.

If it floats you are in an inertial frame

Question 6

define Newton’s second law

Answer 6

the acceleration of an object is directly proportional to the resultant force acting on it. It is also inversely proportional to its mass. The direction of the acceleration is in the direction of the resultant force

Question 7

what is the equation most commonly associated with Newton’s second law

Answer 7

F = ma

Question 8

define Newton’s third law

Answer 8

If a body exert a force on another then the other body will exert a force of the same type, equal magnitude and opposite direction on the original body