Force, Motion, and Energy Flashcards
Define weight.
The measure of the force of gravity on an object
Define motion.
Any change of position
Define force.
A push or pull
Define position.
A certain place, described in comparison with another place
Define acceleration.
A change in speed or direction of an object’s motion
Define friction.
The force that keeps objects that are touching each other from sliding past each other easily
Define frame of reference.
All the things around you that you can sense and use to describe motion
Define newton (not the person).
The metric unit of force
Define speed.
A measure of an object’s change in position during a unit of time
Define relative motion.
Motion described in relation to a frame of reference
Define gravity.
A force that pulls objects toward each other
What pulls any two objects toward each other?
Gravity
What occurs when two objects slide past each other?
Friction
What is caused by an unbalanced force on an object?
Acceleration
What does NOT change when there is no force on a moving object?
Its speed
What causes a spring scale to move?
Weight
What would you call a change in an object’s position?
Motion
Name the TWO states of energy.
Kinetic and potential
What term describes how fast an object is moving?
Speed
In what FOUR ways can force influence motion?
It can cause an object to:
- Move
- Stop
- Change speed
- Change direction
How many of the five examples of “good” friction can you name?
- Waxed surface when bowling
- Lead on paper
- Friction of your finger on a touch screen
- Brakes on bikes (especially on Quantico Street!)
- Friction in sports to help change position, stop, and pivot
How many of the five examples of “bad” friction can you name?
- A heavy object that you need to roll
- Scrapes, burns, or other injuries
- Sports injuries
- Earthquakes
- Pool foot
Name the TWO things that influence friction.
- What the surfaces are made of
2. How are the two surfaces are
How can you describe an object’s motion?
By tracing and measuring its position over time relative to a frame of reference.
Why is Sir Isaac Newton important to the field of physics?
He changed to worldview from Aristotle’s four elements to the Three Laws of Motion. These laws were the first to describe the movement of objects in terms of forces.
Name the First Law of Motion.
A stationary object will not move if all forces acting on it are balanced.
(TECHNICALLY: Objects in motion tend to stay in motion. Objects at rest tend to stay at rest.)
Name the Second Law of Motion.
Force = Mass x Acceleration
Name the Third Law of Motion.
Every action has a reaction in the opposite direction.
TECHNICALLY: Every action yields an EQUAL and OPPOSITE reaction.
