Force1
What is friction?
A force that opposes motion
What is gravity?
force of attraction that exists between two objects
What is a vacuum?
Empty space
Define force.
a push or a pull
What are 2 factors that determine the amount of gravitational attraction?
The mass of each object and the distance between them
Weight is a measure of what?
The gravitational attraction (weight is constant on earth)
How can weight change?
Weight can change depending on where you are (the gravity)
What is the metric unit of force?
Metric- Newton (1kg= 9.8 newtons)
What is a newton?
The unit for force- The measurment of forcein the Metric System
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
What are lubricants?
Things that change the friction
How is mass different from weight?
Mass- amount of matter in an object, it is constant on earth, and new changes depending on location
Friction occurs whenever two surfaces are.........................
Rubbed against each other- in contact
When the air resistance and gravity acting on an object that is falling is equal, what is this called?
Terminal velocity
Balanced forces result in........... Unbalanced forces result in...........
No change in motion/result in a change in motion (start or stop)