Show:
Gravity
Forces
Friction
Friction Labs
Miscellaneous
100
What is the value of "g" (acceleration due to gravity)?
What is 9.8 m/s^2?
100
Define force.
a push or pull on an object
100
This type of surface has a low amount of friction.
TBD
100
Friction is measured in this unit.
What is the Newton?
100
This is the unit for measuring force.
What is the Newton?
200
If you are on a planet where gravity is stronger, would your weight increase, decrease, or stay the same?
What is increase?
200
This is the name for the force that a table exerts upward on a book.
What is the normal force?
200
A solid object moving through a gas or liquid experiences this type of friction.
What is fluid friction?
200
If a block is sliding down a ramp, it will travel further on surfaces with _______________ friction.
What is low?
200
If you are on a planet where gravity is weaker, will your mass increase, decrease or stay the same?
What is stay the same?
300
This is the maximum velocity an object can go, and the object is no longer accelerating.
What is terminal velocity?
300
If forces are this, then the object would not experience a net force and would not move.
What are balanced forces?
300
A box is moving to the left. Friction is acting in what direction on the object?
to the right
300
What type of floor material (high/low friction) should be used for the floor of the moving van?
High friction - to prevent movement.
300
I am trying to move a huge piece of furniture. It is not moving. However, with a big shove I get it moving. In this situation, I have overcome ___________ friction and am now working against ______________ friction.
What is static friction and sliding friction?
400
At terminal velocity, the force of gravity is equal to ____________________________ and the object can no longer accelerate.
What is air resistance?
400
A skydiver falls with a force of gravity of 7 N. The air resistance acting on him his 3 N. What is the resultant force acting on the skydiver?
4 N down
400
This type of friction is easier to overcome than sliding friction.
What is rolling friction?
400
This is why a flat piece of clay would travel slower when sinking in water than a round piece of clay.
What is higher surface area for friction to work on?
400
This is why a penny will not end up killing a person when dropped off the Empire State Building.
TBD
500
You have two objects. Give one way that you can decrease the force of gravity between the objects.
What is decrease their mass or increase the distance between the objects?
500
A box is being pushed to the right by Mel. Draw a force diagram illustrating the 4 forces acting on the box in this situation.
TBD.
500
Give an example of each of the 4 types of friction.
TBD. sliding - box on ground fluid- fish swimming in pool. rolling - bike driving on pavement. static - trying to move a couch (before it can move)
500
As mass of an object increases, how does the force needed to overcome friction change?
it increases.
500
Explain why a larger man should beat a little girl in a tug of war contest. DO NOT say that the man is pulling the rope with more force... that would be incorrect.
more weight of man = higher normal force of ground on man = higher friction. Each step the man takes is with more force than the little girl can match.