Chapter 2 - Newton's First Law

Question 1

At what speed does the Earth move?

Answer 1

30 k/s

Question 2

What is Newton’s First Law?

Answer 2

The Law of Inertia!
“Every object continues in a state of rest/constant velocity unless acted upon by an external force.”

Question 3

What is the Equilibrium Rule? What must happen between gravity & the normal force for Equilibrium?

Answer 3

The vector sum of all the forces is equal to zero. (Net force = 0). “State of no change.”
The gravitational force and the normal force MUST equal zero for equilibrium.

Question 4

What is a Vector Quantity?

Answer 4

A vector quantity has both magnitude (size) & direction.

Question 5

What is a Scalar Quantity?

Answer 5

A scalar quantity only has magnitude (size).

Question 6

What is the Resultant and how do you calculate it?

Answer 6

The resultant is the sum of two (or more) vectors. You calculate it with the Pythagorean Thereom. (a^2 + b^2 = c^2)