Vocabulary
A push or pull on an object that causes it to move, stop moving, or change directions.
Force
Energy of motion?
Kinetic Energy
Two cars that have the same speed run into each other head on. What will happen to the direction and speed of the cars?
They will stop and then bounce backwards away from each other.
Will a roller coaster go faster if it is going down a tall hill or a short hill?
What is the force that opposes a change in motion and will keep an object in motion moving?
Inertia
Force that acts on an object when it rubs against another object or material to oppose or stop motion.
Friction
True or False?
If a car is moving at a constant speed, there is no change in the motion.
True
If two people are exerting the same amount of force on each other by pushing each other, which person will be moved by the other: the one with less mass or more mass?
True or false?
If a ball is sitting still, then it has kinetic energy.
False
What causes a basketball to come back down to the floor when it is thrown straight up?
Gravity
The combination of all forces acting on an object
Net Force
What motion occurs when someone gets into a canoe?
It goes a little lower then bounces back up.
If the net force of two people playing tug of war are equal to 0, what will happen to the rope?
It will not move. Objects with net force 0 will not move.
Example: Two people pushing on one person with the same amount of force.
True or false?
A roller coaster sitting at the top of a hill before it goes down has potential energy.
True
If two forces are NOT equal, are they balanced are unbalanced?
Unbalanced
The distance an object moves in a specific amount of time
Speed
Which could you move further: a bed or a chair?
Chair
What will require the most force to move: a 100 pound bag of rocks or a 25 pound bag of rocks?
100 pound bag
Newton's 1st law of motion says that an object in motion will do what?
Stay in motion
When two items collide, can energy be transferred from one to the other?
Example: Two marbles rolling into each other.
Yes
An object’s resistance to changes in its speed or direction. An object in motion stays in motion. An object at rest, stays at rest.
Inertia
Which type of material provides more friction when rolling a ball: carpet or wood tile?
Carpet
Which road will have the least amount of friction and cause your tires to spin: an icy road or a gravel/rocky road?
Icy road
Ex. The car is moving 55 mph going north.
Motion
If the line on a speed graph is going straight across, what is happening to the speed of the object?
It is staying constant/not changing.