T3L3 Quiz Flashcards
A ____________ must act on an object to cause a change in motion.
net force
In other words, an __________ at _________ will remain at rest unless acted upon by a ___________ net force.
object, rest, nonzero
Another way to think about it: if an object is not _________, it will not start moving until a __________ acts upon it.
moving, net force
If an object is moving, it will _________ at a constant __________ until a net force acts to change its speed or its ___________.
remain, velocity, direction
If there is a net force acting on an object, it will ____________.
accelerate
Resistance to a change in motion
intertia
What is another name for Newton’s First Law?
The Law of Interia
The amount of space something takes up
mass
Why is it harder to stop a car from rolling verses a toy car?
The greater object (the car) has more mass, needing a greater force
What is the relationship between mass and inertia?
The greater the mass the greater inertia
Newton soon discovered that an object’s mass directly affects how much _________ is required to accelerate the object.
force
What does it mean to accelerate an object?
increase/decrease the speed or change direction
Assuming a constant net force, what happens to the acceleration of an object if you increase its mass?
decrease acceleration
Assuming constant net force, what happens to the acceleration of an object if you increase its mass?
decrease acceleration
What is the second law?
An objects mass directly affects how much force is needed to accelerate the object
The size and direction of a net force equals the _______ times the acceleration. The net force has the same _________ as the acceleration.
mass, direction
Equation for mass
M = F/A
Equation for acceleration
A = F/M
Your computer that you are typing on is resting on a surface. Gravity pulls it down on it, but another force (normal force) pushes up on the computer. The force exerted by the surface is __________ is strength and __________ in direction to the force the laptop exerts on the surface.
equal, opposite
What is the 3rd law?
If one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object.
An action force is always paired with a ___________ force.
reaction
When you walk you exert an action force on the ground. What is the reaction force?
the ground
When you hit a baseball with a bat the bat exerts an action force on the ball. What is the reaction force?
the ball on the bat
Why do we not see the earth accelerating towards the pen even though we know it must be happening?
Earth has a large amount of mass
