Questions and Answers
What is force?
A push or a pull
What does a force cause?
An object's motion to change
What are two ways an object's motion can be changed?
Change its direction, change its speed
What is another name for Newton's Second Law?
Signup and view all the answers
What does a change in direction or speed cause?
Signup and view all the answers
What is a change in the velocity of an object called?
Signup and view all the answers
What does Newton's Second Law state?
Signup and view all the answers
What is the equation for Newton's Second Law?
Signup and view all the answers
Acceleration is ______ proportional to Force.
Signup and view all the answers
What does directly proportional mean?
Signup and view all the answers
Acceleration is _____ proportional to Mass.
Signup and view all the answers
What does inversely proportional mean?
Signup and view all the answers
Acceleration of the object is in the ______ direction as the force that causes __________.
Signup and view all the answers
What is the SI Unit for force?
Signup and view all the answers
What is a unit that can be measured directly called?
Signup and view all the answers
What is the derived unit for force?
Signup and view all the answers
What is mass?
Signup and view all the answers
What is weight?
Signup and view all the answers
If there is no gravitational force present, what happens to an object's weight?
Signup and view all the answers
What does weight change with?
Signup and view all the answers
What is the weight equation?
Signup and view all the answers
Study Notes
Force
- Defined as a push or pull that can change an object's motion.
- The effect of a force can be seen in changes to direction or speed of an object.
Newton’s Second Law
- Also known as the Law of Acceleration.
- States that the acceleration of an object is determined by the net force acting on it divided by its mass.
- Expressed in the equation: ( a = \frac{F_{net}}{m} ) or ( F_{net} = ma ).
Acceleration
- Defined as the change in velocity of an object.
- Acceleration is directly proportional to the net force: increasing force leads to increased acceleration, and vice versa.
- Acceleration is inversely proportional to mass: increasing mass leads to decreased acceleration, and vice versa.
- The direction of acceleration is the same as the direction of the force causing it.
Proportional Relationships
- Directly proportional means variables move together; if one increases, the other does too.
- Inversely proportional means one variable increases while the other decreases.
Units of Measurement
- The SI unit for force is the Newton (N).
- Fundamental units are measurable directly, while derived units combine fundamental units (e.g., momentum and energy).
- The derived unit for force is expressed as kg·m/(s²) (kilogram meter per second squared).
Mass vs. Weight
- Mass refers to the amount of matter in an object and remains constant regardless of location (e.g., Earth or Moon).
- Weight is a force influenced by gravity and can change based on location.
- The weight equation is expressed as ( F_w = mg ), where ( m ) is mass and ( g ) is the acceleration due to gravity.
Gravitational Influence
- An object lacks weight in the absence of gravitational force.
- Weight varies depending on the object's location in relation to gravity.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on Newton's Second Law with these flashcards. Each card includes key concepts such as force, acceleration, and how motion can change. Perfect for students looking to solidify their understanding of basic physics principles.
