Chapter 2 Lesson 4 Flashcards
(21 cards)
What is Newton’s third law of motion?
For every action, there is an equal and opposite reaction.
Define a force pair.
A pair of forces that are equal in magnitude, opposite in direction, and act on two different objects.
What does momentum represent?
The product of an object’s mass and velocity.
What is the Law of Conservation of Momentum?
In a closed system, the total momentum remains constant unless acted upon by external forces.
The forces in a force pair act in ________ directions.
opposite
When an object applies a force on another, the second object applies a force of the same ________ on the first object.
magnitude
When an object exerts a force on another object, the second object exerts a force on the first object in the ________ direction.
opposite
According to Newton’s Third Law of Motion, when one object applies a force on a second object, the second object applies an equal force in the ________ direction.
opposite
What is an action force?
The force you apply when you push against an object.
The force you apply is called the ________ force.
action
The object you push on applies an equal and opposite ________ force against you.
reaction
According to Newton’s second law of motion, when the reaction force results in an unbalanced force, there is a(n) ________ force.
net
Momentum is a measure of how hard it is to ________ a moving object.
stop
The force on an object is equal to the mass of the object multiplied by the ________.
acceleration
Because momentum is the product of mass and velocity, the force on an object equals its change in ________.
momentum
In any collision, one object transfers ________ to another object.
momentum
What does the Law of Conservation of Momentum state?
The total momentum of a group of objects remains the same unless outside forces act on the objects.
Name one outside force that decreases the velocities of moving objects.
friction
In a(n) ________ collision, the colliding objects bounce off each other.
inelastic
In a(n) ________ collision, the colliding objects stick together.
elastic
In elastic and inelastic collisions, the total ________ of all the objects is always the same before and after any collision.
momentum
