Dynamics Flashcards
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: Inertia is the tendency of an object to resist changes in its state of motion.
True
Fill in the blank: The law of acceleration is also known as Newton’s _____ Law.
Second
What is the formula for Newton’s Second Law of Motion?
F = ma, where F is force, m is mass, and a is acceleration.
What does the term ‘net force’ refer to?
The vector sum of all the forces acting on an object.
Which unit is used to measure force?
Newton
What is the relationship between mass and weight?
Weight is the force exerted by gravity on an object, calculated as weight = mass × gravitational acceleration.
True or False: Newton’s Third Law states that for every action, there is an equal and opposite reaction.
True
What does the term ‘friction’ refer to?
The force that opposes the relative motion of two surfaces in contact.
Fill in the blank: The measure of an object’s resistance to acceleration is called its _____.
mass
What are the two types of friction?
Static friction and kinetic friction.
good job
What is terminal velocity?
The constant speed that a freely falling object eventually reaches when the resistance of the medium prevents further acceleration.
True or False: An object can experience multiple forces but still remain at rest.
True
Fill in the blank: The force of gravity acting on an object is also known as its _____ force.
weight
What is the effect of increasing mass on acceleration when force is constant?
Acceleration decreases as mass increases, according to Newton’s Second Law.
Multiple Choice: What is the effect of balanced forces on an object?
The object remains at rest or continues to move at a constant velocity.
What is the definition of ‘acceleration’?
The rate of change of velocity of an object.
True or False: A heavier object falls faster than a lighter object in the absence of air resistance.
False
What is the principle of conservation of momentum?
In a closed system, the total momentum before an event is equal to the total momentum after the event.
