Test 2 Study Guide Flashcards
Which forces do work: balanced or unbalanced?
unbalanced
the base of a building
foundation
Opposite poles of a magnet _____________.
attract
Who discovered the laws of motion?
Sir Isaac Newton
The _______________ is the part of the lever which holds and balances weight.
fulcrum
Mass, speed, and direction are all part of an object’s ___________ energy.
moving
a property of matter that makes it resist a change in motion
inertia
An electromagnet can generate ___________________ force.
electromagnetic
An object in motion will stay _________________ unless acted upon by an unbalanced force.
in motion
A machine is a device that makes ______________ easier.
work
Why does the moon have less gravity than the earth?
It is smaller.
It has less mass.
the push or pull on an object to move it
force
this is the most stable shape because of a low center of gravity
pyramid
acts like a giant electromagnet
Earth
the movement resulting from force
work
this increases with a rough surface
friction
two objects bumping into each other
collision
this has a magnetic field because of its polarity
magnet
the amount of matter an object has
mass
a type of inclined plane
screw
this machine can help overcome friction
wheel and axle
this machine is designed to overcome weight and make lifting easier
pulley
Sound is an example of _______________ energy in a collision.
converted
A ____________ gives a building its shape.
frame
Energy transfers in a collision can cause the _______________ of objects to change.
speed
Wax can be used as a _____________ to minimize friction.
lubricant
____________ forces allow work to be done.
Unbalanced
_____________ forces prevent work from being done.
Balanced
