A
A push or a pull
What is force?
All objects are attracted to each other because of the force of _____________ between them.
What is gravity?
force that opposes the motion of an object
What is friction?
What is vacuum?
The size and the direction of the force
What are the two things to describe the force?
masses and distance between them
What are the 2 things gravitational force between two objects depends on?
Keeps an object at rest
What is static friction?
speed at which air resistance and gravity acting on a falling object are equal
What is terminal velocity?
Forces are equal in size but opposite directions
What is balanced forces?
Caused by weight and movement of air molecules
What is Air Pressure?
The force that is required to keep a surface sliding along another surface
What is sliding friction?
The amount of force acting on a unit area of a surface
What is pressure?
What is change?
Used to measure air pressure
What is a barometer?
As speed of a fluid increases, pressure decreases
What is Bernoulli's Principle?
caused by the weight and movement of water molecules
What is water pressure?
Water pressure increases with
What is depth?
Famous scientist that wondered why all objects fall to the ground
Who is Isaac Newton?
Unit of force was named in honor of
force resisting the motion when a ball/tire/wheel rolls on a surface