Vocab
What is a vector?
An arrow that shows both size and direction.
I am pushing 50N to the right, and friction is pushing 30N to the left. What is my net force and what is the direction?
20N to the right
A car travels down a straight highway at a constant speed of 60MPH without speeding up or slowing down
Balanced because speed and direction are constant
A soccer ball is rolling across a grass field, It eventually slows down and stops. Why does it stop?
An unbalanced force pushes against its motion
I am pushing 10N to the left, and friction is pushing 10N to the right. What is the net force and what is the direction?
0N and no direction
A bicyclist is riding down a hill quickly and pulls the breaks, causing the bicycle to slow down rapidly.
Unbalanced, the bike slows down causing a change in the speed.
What is the unbalanced force that pushes against motion (in the opposite direction of motion)
Friction
I am pushing 100N to the left, and my brother is pushing 50N to the left. What is the net force and what is the direction?
150N to the left
A student is standing completely still while waiting in the cafeteria line
Our weight
A plane is taking off with 150N pushing upwards, gravity is working against the plane with 10N. What is the net force and direction?
140N up
A roller coaster takes a sharp left turn in its tracks
Unbalanced, the direction changes