NEWtons 1 2 3 laws and XLERATION Flashcards
learn (24 cards)
What is Newton’s First Law of Motion?
An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.
True or False: Newton’s First Law is also known as the Law of Inertia.
True
Fill in the blank: According to Newton’s First Law, the state of motion of an object will not change unless a _____ is applied.
force
What does Newton’s Second Law of Motion state?
The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
What is the formula associated with Newton’s Second Law?
F = ma (Force equals mass times acceleration)
True or False: In Newton’s Second Law, mass and acceleration have a direct relationship.
False
What is meant by ‘net force’ in Newton’s Second Law?
The total force acting on an object after all the individual forces are combined.
What is Newton’s Third Law of Motion?
For every action, there is an equal and opposite reaction.
True or False: Newton’s Third Law implies that forces always occur in pairs.
True
Fill in the blank: According to Newton’s Third Law, if object A exerts a force on object B, then object B exerts an equal and _____ force on object A.
opposite
How does mass affect acceleration according to Newton’s Second Law?
Greater mass results in less acceleration for the same amount of force.
Multiple Choice: Which law explains why a passenger lurches forward in a car when it suddenly stops?
A) Newton’s First Law
What is inertia?
The tendency of an object to resist changes in its state of motion.
Multiple Choice: Which of the following is a direct consequence of Newton’s Third Law?
C) A rocket propelling itself forward by expelling gas backwards.
Fill in the blank: The unit of force in the International System of Units (SI) is the _____.
Newton
True or False: An object can be in motion with zero net force acting on it.
True
What does it mean when an object is in a state of equilibrium?
The net force acting on the object is zero.
Multiple Choice: If a car accelerates from rest to a speed of 20 m/s in 5 seconds, what is the acceleration?
B) 4 m/s²
Define action-reaction pairs.
For every action force, there is an equal and opposite reaction force.
What role does friction play in Newton’s laws?
Friction is a force that opposes motion and can affect the net force acting on an object.
True or False: An object will continue moving indefinitely in a straight line if no forces act upon it.
True
What is the relationship between force, mass, and acceleration in Newton’s Second Law?
Force equals mass times acceleration.
Multiple Choice: Which of the following scenarios illustrates Newton’s First Law?
A) A book resting on a table remains at rest until someone picks it up.
Fill in the blank: The acceleration of an object is directly proportional to the _____ applied.
force
