Friction
Gravity & Magnetism
Balanced & Unbalanced Forces
All about Force
Motion
100
What can be done to reduce friction?
Using a lubricant like wax or grease on a surfaces area would reduce friction.
100
Which two forces can act on an object without touching it?
Magnetism and Gravity are both forces that can act on an object without touching it.
100
_______________ forces are opposite in direction and equal in size.
Balanced forces
100
What is a force?
A push or a pull
100
Any push or pull that causes an object to move, stop or change direction is called _______
A force
200
What type of surface area would have the least amount of friction? -Tile -Carpet -Ice -Concrete
An icy surface would have the least amount of friction.
200
What is gravity?
Gravity is a force that tries to pull two objects to each other.
200
An object at rest is an example of which, a balanced or unbalanced force?
An object at rest is an example of a balanced force.
200
On a graph, the farther something goes in a short amount of time, the _____________ it is moving.
faster
200
What type of graph is used to show the data on an object's motion over time?
A change over time line plot or line graph
300
What type of surface area would have the most friction? -Wood floor -Carpet -Ice -Concrete
A carpeted surface would have the most friction.
300
What is the effect of gravity between the Earth and objects on it?
Objects are pulled toward the ground due to the Earth's gravitational pull.
300
Two people are each pulling on the opposite ends of a rope. If they are pulling on the rope with equal but opposite forces, what will happen to the rope?
The rope will not move. It will stay in the same place because there is a balanced force being applied to the rope.
300
On a graph, if there is a straight horizontal line (line from left to right) it means the object is _________________.
not moving or stationary
300
What can Bike riders do to reduce drag (air resistance) as they peddle?
They can tuck their heads down and put their arms close to their bodies.
400
What is friction?
Friction is a force that opposes motion between two surfaces that are touching.
400
Opposite poles are _______________ to each other.
attracted
400
An object moving along a surface suddenly increases speed. What can cause this to happen?
It is moved by an unbalanced force.
400
What are the three things that affect the amount of friction on an object?
1. type of surface area 2. amount of surface area 3. lubricants like oil, wax, or grease
400
The location of an object in relation to another object is known as an object’s ____________.
position
500
When workers spread sand over icy bridges and roads in the winter, how does this help people drive on the roads?
The sand increases friction between the road and the tires of a car.
500
What is magnetism?
Magnetism is an invisible force that acts between a magnet and an object with iron in it.
500
____________________ are not equal in all directions and can make things move faster, slower, or change directions.
Unbalanced forces
500
If you were asked to design the ultimate racing vehicle, what could you do to reduce friction?
Streamlining the shape of the vehicle (aerodynamics)
500
The three components of an object’s motion are _________________________.
The three components are direction, speed, and position.
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