Newton's laws of motion

Question 1

What is Newton’s first law of motion?

Answer 1

Newton’s first law of motion states the velocity of an object will not change unless a resultant force acts on it.

Question 2

What is Newton’s second law?

Answer 2

The rate of change of momentum of an object is directly proportional to the resultant force which acts on the object.

Question 3

What is the equation for Newtons second law?

Answer 3

F = mv/t

Question 4

If mass is constant how can Newton’s 2nd law be expressed in an equation?

Answer 4

resultant force (F) = mass(m) x acceleration (a)

Question 5

What is Newton’s 3rd law?

Answer 5

If an object A exerts a force on object B, then object B exerts an equal but opposite force on object A.

Question 6

Why does the equal and opposite forces of gravity acting on a book against the table pushing back not show Newton’s 3rd law?

Answer 6

For Newtons third law the pair of forces acting have to be of the same type. Therefore a book resting on a table is an example of Newton’s first law.