Force
Force
Force
Force
Force
100
What is friction?
A force that opposes motion
100
What is gravity?
force of attraction that exists between two objects
100
Which unit is used to measure gravity?
meters per squared seconds
100
What is acceleration?
The measurment of how quickly the speed changes
100
What is newton?
The unit for force- The measurment of forcein the Metric System
200
Define force
a push or a pull
200
What are 2 factors that determine the amount of gravitational attraction
The mass of each object and the distance between them
200
Weight is a measure of what?
The gravitational attraction (weight is constant on earth)
200
How is mass different from weight
Mass- amount of matter in an object, it is constant on earth, and new changes depending on location
200
What do you measure with a spring scale? With an electronic balance?
You measure weight with a spring scale mass with an electronic balance.
300
How can weight change?
Weight can change depending on where you are.
300
What is the metric unit of weight (force)? English system unit?
Metric- Newton (1kg= 9.8 newtons) english = pound
300
What is the rate of acceleration due to gravity?
9.8m/s squared
300
Balanced forces result in........... Unbalanced forces result in...........
No change in motion/result in a change in motion (start or stop)
300
Friction occurs whenever two surfaces are.........................
Rubbed against each other- in contact
400
Graph of speed versus time will be what shape?
straight line ( represents acceleration)
400
Graph of time versus mass will be what shape?
curved line
400
What is Newton's 1st law?
Law of inertia-the tendency of an object to remain or rest unless acted upon by a unbalanced force
400
What is an example of Newton's 1st law?
Car stopping and you move forward into your seatbelt
400
What is Newton's 2nd law?
Force- mass acceleration; objects with more mass needs more force acceleration of an objects depends on massand amount of force
500
What is an example of Newton's 2nd law?
A heavy bat is harder to swing than a lighter one
500
What are the two factors that determine the amount of force according to the 2nd law of motion?
mass and aceleration
500
What is Newton's 3rd law?
every action has an equal or opposite reaction
500
What is an example of Newton's 3rd law?
running into a tree
500
Explain why the crumpled sheet of paper will hit the ground before the uncrumpled sheet of paper?
It has less exposed surface area and less air resistance
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