Forces
Motion
Friction
Simple Machinces
Name the Force
100
A force is a _______________.
A push or a pull
100
The position of an object has changed if it has __________________.
moved to a different location.
100
Friction is _______________________.
A contact force that goes AGAINST motion.
100
What is a wedge, and what is it used for?
A wedge is two inclined planes that come to a point, and it is used to cut or split things.
100
A sister takes her brother for a ride in a red wagon.
A pull
200
Name two NON-CONTACT forces.
Friction and Gravity
200
Name three words that describe motion.
Examples: circular, forward, backward, sideways, upward, downwards
200
Do all surfaces have friction? Explain your answer.
All have friction, but they have different amounts. Ice would have very little, but carpet would have a lot.
200
What is a screw and what is it used for?
A screw is an inclined plane, wrapped around a central point. It is used to hold things together, or lower and raise things.
200
Sammy kicks a soccer ball to score the winning goal!
push
300
Name at least 3 contact forces.
A push a pull friction
300
While driving, a large tree is in front of the car. After the car passes it, the tree is behind the car. The position of the car is being compared to the position of the tree. This is an example of ___________________.
Relative Position
300
Which has the least amount of surface? A grassy field, or the gym floor?
The gym floor
300
How is kicking a ball down a hill an example of force?
You are using a force (a kick) to move an object (a ball)
300
The paperclip starts to move toward the whiteboard eraser that is on the table.
magnetism
400
Imagine 2 teams playing tug-of-war. How will one team win over the other team?
To win, one team out need to have a greater force than the other team.
400
A horse horse starts galloping at 5 mph, speeds up to 11 mph, and then finishes his trip at 4 mph. How can you best describe the horse's speed?
VARIABLE speed
400
Is air a friction force? Think about dropping a feather off the top of a skyscraper.
Yes it is. Air will work against the force of gravity.
400
What type of simple machine would raise a flag up a flagpole?
A pulley
400
As a pitcher throws a ball toward the pitchers mound, the ball starts to move towards the ground.
Gravity
500
Explain two ways gravity can affect the movement of a wheel and axle while riding a bicycle.
Gravity would make it harder while going uphill and easier going downhill. More force needs to be applied to the pedals while going uphill, and less while going downhill.
500
Explain why combined forces are used to create motion. What is an example?
combined forces allow two or more forces to work together to move objects. An example is a bike: pedals, gravity, and turning handlebars.
500
Explain how friction can be a helpful force.
When you want to stop while skating or sledding.
500
How do simple machines make work easier?
Simple machines help people do the same amount of work, but with less force.
500
A moving man uses an inclined plane to transport a bookshelf.
Push
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