Motion
What is the distance an object moves in one unit of time called?
Speed
A push or pull is called what?
A force
The tendency of an object to resist change in its motion is called what?
Inertia
True or false: Without friction, any object in motion would continue to move at constant speed forever.
True
The amount of matter in an object is called what?
Mass
What is speed in one given direction called?
Velocity
True or false: Unbalanced forces acting on an object will change the object’s motion.
True
True or false: Isaac Newton’s first law of motion is also called the law of mass.
False. (It is also called the law of inertia.)
Objects falling through air experience a type of fluid friction called what?
Air resistance
What unit of measurement was named in honor of Isaac Newton?
The Newton
What is a place or object used for comparison to determine if something is in motion?
A reference point
What are equal forces acting on one object in opposite directions called?
Balanced forces
Which of Isaac Newton’s laws of motion is associated with an “action” force and a ”reaction” force?
Isaac Newton’s third law of motion.
What is the force of gravity on a person or object at the surface of a planet called?
Weight
How much grams are in a kilogram?
1000 grams
The rate at which velocity changes is called what?
Acceleration
Which force pulls objects toward each other?
Gravity
Which of Isaac Newton’s laws of motion is this equation, Force = Mass x Acceleration, associated with?
What kind of friction occurs when solid surfaces slide over each other?
Sliding friction
You can increase acceleration of an object by changing its force or its what?
Its mass
What are the three main forms of acceleration?
Increasing speed, decreasing speed, and changing direction.
How much do objects accelerate as they fall?
9.8 m/s²
What is the name of the law that states that the force of gravity acts between all objects in the universe?
The law of universal gravitation
The strength of the force of friction depends on what two factors?
The types of surfaces involved and how hard the surfaces push together.
The greater the mass of an object, the greater its what?
Inertia