Vocab
the amount of matter in an object
mass
The astronomer Copernicus publicly stated in the 1500s that Earth
revolves around the sun.
Newton's First Law of Motion is also known as
the Law of Inertia
1 kg is equal to how many Newtons
9.81 N
Friction is a force that always acts
opposite to an object's motion
Newton
the SI unit of force
The name of the astronomer who first publicly stated that Earth revolves around the sun
Copernicus
The law of inertia states that an object:
a) will continue moving at the same velocity unless an outside force acts on it.
b) will continue moving in a straight line unless an outside force acts on it.
c) That is not moving will never move unless a force acts on it.
d) at rest will remain at rest unless acted on by an outside force.
e) all of the above
e
How much in Newtons does a 10 kg bag of grass seed weigh?
98.1 N
Which has more mass, a kilogram of feathers or a kilogram of iron?
Neither- both have the same mass
The force due to gravity acting on an object is its mass, true or false
false, it's weight
Which scientist divided motion into two types
Aristotle
The law of inertia applies to
both moving and nonmoving objects
66.32 kg
What is the difference between mass and weight
Mass: amount of matter in an object, does not change wherever you go
Weight: the force acting on a object due to gravity; changes where you go*
weight is relative to the gravitational force acting on the mass of an object
Support force
Which scientist did Newton base his views of motion off of?
Galileo
An object following a straight-line path at a constant speed
has zero acceleration
You would have the largest mass of gold if your chunk of gold weighed 1 N on
the moon
After a cannonball is fired into a frictionless space, the amount of force needed to keep it going equals
zero, since no force is necessary to keep it moving
Equilibrium
a state in which opposing forces or influences are balanced
What was the controversial topic that Copernicus and Galileo supported?
What is Newton's First Law?
“Every object continues in a state of rest, or of motion in a straight line at a constant speed, unless it is compelled to change that state by forces exerted upon it.”
On the surface of Jupiter, the acceleration due to to gravity is about 3 times that on Earth. How much would a 0.40-kg rock weigh on Jupiter?
11.76 N
If the force of gravity suddenly stopped acting on the planets, they would
move in a straight lines tangent to their orbits