Gravity is the force that pulls objects towards each other at all times.
What is gravity?
100
Mass is the amount of matter in an object.
What is mass?
100
Friction is the that prevents motion between two surfaces that are touching.
What is friction?
100
An objects change in position compared to a reference point.
What is Motion?
100
A force is a push or a pull exerted on an object that can change the set an object in to motion or to stop a moving object.
What is a force?
200
Isaac Newton discovered gravity.
Who discovered gravity?
200
Mass always stays the same, but weight changes based on the strength of the gravitational force.
What changes when you go into space, your weight or your mass?
200
There is more friction when a surface is rough because of microscopic bumps and valleys.
Why is there more friction when an object has a rough surface?
200
You can determine the average speed of a moving object by using the equation distance= total distance/total time.
How do you determine the average speed of a moving object?
200
The smaller force subtracted form the larger force will give you the net force of an object being pulled in two different directions.
How do you determine the net force of an object being pulled in two different directions.
300
Relationships between mass, force, and distance.
What is the law of universal gravitation?
300
Distance and mass determine the gravitational force between two objects.
What two factors can determine the gravitational force between objects?
300
Kinetic friction is when an object is being moved, and static friction is when an object is stationary.
What is the difference between kinetic and static friction.
300
The Reference point is an object that appears to stay in place, and can be used to determine how far a moving object has traveled.
What is a reference point?
300
A force that you are unable to see is two magnets attracting or repelling each other.
What is an example of a force you cannot see?
400
The sun has the strongest gravitational force in our solar system.
What has the the strongest gravitational force in our solar system?
400
The difference between mass and density is that mass is the amount of matter in an object, and density is a measure of how closely packed the molecules are.
What is the difference between density and mass?
400
Lubricants are materials such as oil or water that can reduce friction between objects.
What is a lubricant?
400
Velocity is the speed and direction of a moving object. Acceleration is a change in velocity over time.
How are velocity and acceleration related to each other?
400
A book sitting on a table is an example of balanced forces acting on an object Gravity is pulling the book down but the table pushes the book up.
What is an example of an balanced force?
500
A black hole has a gravitational force so strong it can trap light inside of it.
What has a gravitational force so strong light cannot escape it?
500
An object on the moon weighs about 1/6 of what it does on earth
What is the weight of an object on the moon in comparison to earth?
500
You can increase friction by increasing the force pushing the surfaces together or making the surfaces rougher.
How can you increase friction?
500
Average acceleration = final velocity-starting velocity/ time it takes to change velocity.
What is the formula to calculate average acceleration?
500
An apple falling from a tree is an example of an unbalanced force acting on an object. In this case, the unbalanced force is gravity.
What is an example of unbalanced forces acting on an object?