Newton's laws of motion

Question 1

what is inertia?

Answer 1

Inertia is the tendency for an object to remain at rest or in uniform motion unless acted upon by an external unbalanced force.

Question 2

What is mass?

Answer 2

Mass is a quantitative measure of inertia (kg)

Question 3

What is frames of Reference? (if it holds)

Answer 3

a frame of reference in which Newton’s first law holds is an inertial frame of reference. All frames of reference travelling at a constant speed are inertial frame of reference.

Question 4

What is frames of reference? (if it doesn’t holds)

Answer 4

A frame of reference in which Newton’s first law does not old is a non-inertial or accelerated frame of reference. The earth is a good approximation to an inertial due to rotation around the sum are very small, small enough for the earth to appear to be an inertial frame of reference.