What is Newton's 1st Law is the law of ______________.
inertia
100
Newton's 2nd Law is the law of ______________.
F=ma
100
What parts does a lever have?
A fulcrum and a rigid bar
100
On the moon, all objects fall at _________________.
the same rate of acceleration
100
What is the buoyant force?
The upward force on an object by the fluid it is in.
200
An object will keeps its motion unless... what?
unless a force acts on it.
200
Newton's 3rd Law is the law of ______________.
action-reaction
200
What two forces act on a lever?
effort force and load
200
What is weight?
mass times acceleration due to gravity
200
What is displacement?
How much fluid an object makes move out of the way when its sinking or floating
300
What is acceleration?
A change in velocity
300
What does the "F" in F=ma stand for?
net force
300
What is the distance from the effort force to the fulrum called?
The effort arm
300
What two forces/properties combine to make an orbit?
gravity and inertia
300
What is Archemides' Principle?
The buoyant force on an object is equal to the weight of the fluid the object displaces.
400
What unit is used to measure acceleration?
meters per second squared (m/s^2)
400
What is a "reaction"
the force the second object returns to the first object in response to an action
400
Levers can make more force or distance, but the amount of _______ does not change.
work
400
What is accleration due to gravity on Earth?
9.8 m/s^2 downward
400
How much force does a 2 m^3 object with a density of 1400 kg/m^3 exert on the bottom of a tank of water? (Assume to density of water is 1000 kg/m^3 and acceleration due to gravity is 10 m/s^2.)
8,000 N
500
What is the difference between speed and velocity?
Velocity has a direction while speed doesn't
500
What is friction with the air called?
air resistance or drag
500
What are the 6 types of simple machines?
levers, ramps, screws, pulleys, wheel & axels, and wedges
500
What two factors affect the force of gravity?
The masses of the objects and the distance between them