Newton's Laws of Motion Flashcards
(13 cards)
What does Newton’s First Law state?
An object’s velocity only changes if a resultant force is acting on it.
What happens if the resultant force on a stationary object is zero?
The object stays stationary.
What happens if the resultant force on a moving object is zero?
It continues moving at the same velocity in a straight line.
What happens if the resultant force on an object is not zero?
The object’s velocity changes.
List 5 things a change in velocity could mean.
Starts to move, stops moving, speeds up, slows down, changes direction.
What must happen for an object to change its motion?
A resultant force must act on it.
What does Newton’s Second Law state about acceleration?
Acceleration is proportional to force and inversely proportional to mass.
What is the equation for Newton’s Second Law?
F = m × a
In the equation F = m × a, what do the letters mean?
F = force (N), m = mass (kg), a = acceleration (m/s²)
What is the symbol for momentum and how is it different from mass?
Momentum = p, Mass = m
What does Newton’s Third Law state?
Every action has an equal and opposite reaction.
What does Newton’s Third Law say about interacting objects?
They exert equal and opposite forces on each other.
What are the four features of force pairs in Newton’s Third Law?
Act on separate objects, same size, opposite directions, same type
