Practice Problems 1
When forces are acting in opposite directions what do you do with the numbers?
SUBTRACT
When forces are acting in the same direction, what you do with the numbers?
ADD
What is force measured in?
Newtons
A measure of how much matter is in a substance.
Mass
When an object is not moving the forces are _______________.
Balanced
15 N pushing right, 10 N pushing left
What is the DIRECTION????
RIGHT
7N pulling left, 2N pulling right
What is the NET FORCE???
5N
How many laws of motion are there?
3
This can either be a push or a pull.
Force
When an object is not moving the net force is _____________.
0 Newtons
30 N pushing left, 4 N pulling left
What is the DIRECTION????
LEFT
3N pushing right, 3N pushing right
What is the NET FORCE???
6N
Who created the laws of motion?
Issac Newton
The force that opposes motion between any surfaces that are in contact.
Friction
When an object is moving, the forces are _____________.
Unbalanced
4 N pulling up, 2 N pushing down, 2 N pushing right, 5 N pulling right
What is the DIRECTION????
UP, RIGHT
4N pushing right, 4N pushing left
What is the NET FORCE???
0N
The property of objects with mass to resist any changes in their motion.
Inertia
What force pulls an object to the ground?
Gravity
As an object falls through the air, ________ acts on it.
2 N pushing down, 2 N pushing down, 3N pulling up, 1 N pulling up, 7 N pulling right, 4 N pushing right, 11 N pushing left
What is the DIRECTION????
NO MOVEMENT
6N pushing right, 3N pulling right
What is the NET FORCE???
9N
What is Newton's 1st Law?
An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force.
The sum of all forces acting on an object.
Net Force
An object will move in the direction of the _______ force.
Greater