Push or Pull forces
What is the simplest definition of a force?
A push or pull
What do we call the total or sum of all forces acting on an object?
Net force
If an object is sitting still on a table, are the forces balanced or unbalanced?
If an object is speeding up, are the forces balanced or unbalanced?
Unbalanced
What is the force that pulls objects toward the center of the earth?
Gravity
If you are kicking a soccer ball, are you using a push or a pull force?
A push
If you pull a box to the right 5N and your friend pulls to the left with 5N, What is the net force?
0N because they cancel out
If the net force on an object is 0N, does it move?
No, it stay still
If you push a chair and it starts moving, what kind of force did you use?
Unbalanced force
What is the force that opposes motion between two surfaces that are touching?
Friction
When you open a door and it comes in your direction, is it a pull or a push?
a pull
If you push a cart with 10N and your friend pushes with 5N in the same direction, what is the total net force?
15N because you add them if they are going in the same direction
If at tug of war both teams are pulling with the same exact strength.What happens to the rope?
It does not move
If you are running for a long time, are the forces balanced or unbalanced?
They are unbalanced because you cannot stay at a constant speed the entire time
If you slide a book across a carpet, what force causes it to eventually stop moving?
Friction
True or False?
A force can change the direction of a moving object
True
A box has 20N pulling left and 15N pulling to the right, what is the net force and what direction does it move?
5N to the left
If a plane is flying at a steady speed in a straight line, are the forces balanced?
Yes the forces are balanced
What is the name of the force that causes an object to speed up or slow down?
Unbalanced force
How does the force of gravity change if you move an object from Earth to the Moon? Does the force decrease or increase?
The force decreases
Give an example of a pull force you use in your daily life
Examples:Opening a drawer,Pulling a door,and so much more
You push a wall with 50N of force, but it does not move.What is the net force?
0N because the wall pushes back with the same force
Why doesn´t a book sitting on a desk fall through?
The table pushes up with the same force that the gravity pulls down
If you are riding a bike and you hit the brakes, what force are you using?
Unbalanced force because of the brakes
If you dropped a bowling ball and a feather in a room with no ai, which one would hit the ground first?
They would hit the ground about the same time because there is no air to push against the feather