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Basic Forces Questions
Acting Forces
Gravity
Free body diagrams
Friction
100
What are the two categories that all forces are placed it?
Contact and Action-at-a-Distance forces
100
A football is moving upwards toward its peak after having been booted by the punter. What force is acting on the ball?
Gravity
100
Gravity acts on all objects that have ____.
Mass
100
How do you represent an object in a free body diagram?
with a box
100
How many types of friction are there?
4
200
Define Force
A push or a pull on an object.
200
A boy is leaning against a wall in his classroom. Name all of the forces acting on the boy.
Normal force and gravity
200
Force of gravity would be known as this on a FBD.
F grav
200
Force is a vector, which means it has both ____ and ____ that are represented by an arrow.
magnitude and direction
200
Friction occurs when two surfaces do what?
rub together
300
Slippery substances like grease, are lubricants that reduce this force.
Friction
300
What is Newton's 1st Law of Inertia?
A object at rest will stay at rest and an object in motion will remain in motion unless acted on by an unbalanced force.
300
What specific location does the force of gravity come from?
The center of the earth.
300
Each arrow on a FBD is labeled to show a type of ____.
force
300
A person driving a car is an example of this type of friction
Rolling
400
What type of force does F app stand for?
applied force
400
What is the name of the units of force?
Newtons
400
Why doesn't the moon crash towards the earth's surface?
It has a lot of mass so it feels the earth's force of gravity less than we do.
400
What direction will the force of gravity always be facing on a FBD?
downward
400
What encounters more friction- a box being pulled across a shiny wooden floor or a box being pulled across cement outside? Why?
Cement floor outside causes more friction because the surface is more grainy.
500
Name at least 2 action at a distance forces
magnetic, gravity, electrostatic
500
What is friction?
A force that acts in the opposite direction of motion. It slows things down.
500
Where is an object's center of gravity?
The exact center of its mass
500
True of false, it is possible for a free body diagram to show just one force acting on it in a certain situation?
True
500
The strongest type of friction is?
sliding friction