Chapter 3, Test 2 Flashcards
True or False
Unbalanced forces do work.
True
True or False
The frame is the base of a building.
False (Foundation)
True or False
Opposite poles of a magnet repel.
False (attract)
True or False
Sir Isaac Newton discovered the laws of motion.
True
True or False
The axle is the part of a lever which holds and balances wait.
False (fulcrum)
True or False
Mass, speed, and direction are all part of an objects moving energy.
True
True or False
Inertia is a property of matter that makes it resist a change in motion.
True
True or False
An electromagnet can generate gravity.
False (electromagnetic force)
True or False
An object in motion will stay at rest, unless acted upon by an unbalanced force.
False (in motion)
True or False
A machine is a device that makes work easier.
True
Give an example of something with more mass than a car.
Airplane
Give an example of something with less mass than an elephant.
Cat
Why does the moon have less gravity than the Earth?
It’s smaller
_____ is the push or a pull on an object to move it.
collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work
force
____ is the most stable shape because of a low center of gravity.
collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work
Pyramid
_____ is a property of matter that makes it resist a change in motion.
collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work
Inertia
____ acts like a giant electromagnet.
collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work
Earth
_____ is the movement resulting from force.
collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work
Work
_____ increases with a rough surface.
collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work
Friction
_____ are two objects bumping into each other.
collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work
Collision
____ has a magnetic field because of its polarity.
collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work
Magnet
____ is the amount of matter in an object has.
collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work
Mass
_____ is a type of inclined plane.
collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work
screw
_____ is a machine that can help overcome friction.
collision
cube
Earth
force
friction
inertia
magnet
mass
pyramid
screw
wheel and axle
work
Wheel and axle
A _____ has more inertia in a dog.
any
horse
kitten
horse
A ____ is a machine designed to overcome wait and make lifting easier.
pulley
wave
wheel and axle
pulley
Sound community sample of _____ energy in a collision.
converted
moving
transferred
Converted
A ____ gives a building a shape.
frame
foundation
fulcrum
frame
Energy transfers in a collision can cause the ____ of objects to change.
mass
speed
weight
speed
Wax can be used as a ______ to minimize friction.
lodestone
lubricant
machine
lubricant
Balanced Forces or Unbalanced Forces
Prevent work from being done
Balanced forces
Balanced Forces or Unbalanced Forces
allow work to be done
Unbalanced Forces
Balanced Forces or Unbalanced Forces
a chair resting on the floor
Balanced forces
Balanced Forces or Unbalanced Forces
a person pushing a lawnmower
Unbalanced forces
