Force
A push or pull; measured in Newtons.
What is Force?
The direction an object falls on Earth.
What is down?
The basic SI unit of Force.
What is a Newton (N)?
Force that opposes the motion of an object.
What is Friction?
Materials that reduce friction.
What are lubricants?
Kinds of forces that cause an object to move.
What are Unbalanced Forces?
The scientific law that explains why objects fall.
What is Newton's Law of Gravity (Universal Gravitation)?
Scientific, bathroom, grocery store
What are three (3) types of spring scales?
Made possible by friction.
What is motion?
Always less than the amount of sliding friction.
What is the amount of rolling friction?
The measure of the force of gravity acting between Earth and an object.
What is the weight of an object?
Depends on the mass and distance between two objects.
What is gravitational force?
9.8 Newtons (9.8 N)
What is the force needed to lift a 1-kg mass on Earth?
When two surfaces make some form of contact with each other.
When does friction occur?
Easier to move heavier objects.
Why do we use lubricants?
The forces acting on a book do not cause a change in motion.
What effect will balanced forces have on a book?
This decreases as the distance between two objects increases.
What is the force of gravity?
Measured when weighing an object using a spring scale.
What is the force of gravity acting on an object?
Static Friction, Sliding Friction, Air Resistance, and Rolling Friction.
What are the different types of friction?
The size of the force of friction depends on this.
What is the types of surfaces in contact with each other?
An object is put into motion after sitting still.
What happens when unbalanced forces act on an object?
Your weight if you were twice as far from the Earth's center as you are now.
What is 1/4 as much weight? (1/d2 = 1/22 = 1/4)
The number at which the pointer stops on a scale.
What is an object's weight?
Climbing a rope, throwing a ball, or walk down the street.
What are things that are not possible without friction?
Slipping on an icy sidewalk or a car skids out of control.
What can be caused by not enough friction?