Newton's 2nd and 3rd Law Flashcards
What does Newton’s Third Law state?
For every action force there is an equal and opposite reaction force.
In Newton’s Third Law, what do action and reaction forces act on?
Different objects.
What is the mathematical representation of Newton’s Second Law?
F = ma
In the equation F = m * a, what does F represent?
Net force (N)
In the equation F = m * a, what does m represent?
Mass (kg)
In the equation F = m * a, what does a represent?
Acceleration (m s⁻²)
According to Newton’s Second Law, how is acceleration related to force?
Directly proportional.
According to Newton’s Second Law, how is acceleration related to mass?
Inversely proportional.
What is mass?
Mass is the amount of matter in an object
What is weight?
Weight is the force of gravity acting on an object
What is the acceleration due to gravity on Earth?
9.80 m s⁻²
What do scales measure when you stand on them?
Your mass/
True or False: Mass and weight are the same in physics.
False.
What assumption do scales make when measuring mass?
You are on Earth, relatively close to sea level.
Identify the force pair: A sprinter pushes on the starting blocks.
The blocks push back on the sprinter.
Identify the force pair: A hammer hits a nail.
The nail exerts a force back on the hammer.
Identify the force pair: A book rests on a table.
The table exerts an upward force on the book.
Identify the force pair: A skateboarder pushes himself along.
The ground pushes back on the skateboarder.
Identify the force pair: A gun fires.
The bullet exerts a force on the gun, and the gun exerts a force on the bullet.
