Use the "Force"
The Fab "Four"
"Weight" a Minute
"Magnetic" Personalities
Mag-NEAT-o!
3-2-1 "Contact"
"Fluid" Dynamics
Newton's Laws
100
Which word describes a push or a pull that causes objects to interact?
force
100
What force binds protons and neutrons together in the nucleus of atoms?
Strong nuclear force (or strong force) is the strongest force in the universe!
100
What word describes the force exerted on an object by gravity?
Weight
100
What word describes the non-contact force that is caused by the spin and orbit of electrons within atoms?
Magnetism
100
What word describes materials or objects that are strongly attracted to a magnet?
Ferromagnetic
100
What word describes a force that is applied directly to an object by a person, object, or moving fluid?
Applied force
100
What word describes a force opposing gravity exerted on an object placed in a fluid?
Buoyancy
100
How many laws did Sir Isaac Newton state that describe how forces affect the motion of objects?
Three
200
What word describes forces that require direct contact between objects to cause interactions?
contact forces
200
What force causes smaller particles inside protons and neutrons to change and give off energy in the form of radiation?
Weak nuclear force (or weak force)
200
What two things does an object's weight depend upon?
(1) the object's mass, and
(2) the strength of the gravitational force attracting the object
200
What word describes the area in which a magnet can affect matter?
Magnetic field
200
What is an example of an object or element that is strongly attracted to a magnet?
Objects containing iron, cobalt, nickel, and steel are strongly attracted to magnets.
200
What word describes the support force between two objects that are in contact with one another?
Normal force
200
What word describes the force that resists motion of an object through a fluid?
Drag
200
Which law states that an object at rest stays at rest until acted upon by an unbalanced force?
Newton's first law of motion
It also states that an object that is moving will continue to move in the same direction and at the same speed unless an unbalanced force acts on it.
300
What word describes forces acting on objects that are at rest and not moving?
balanced forces
300
What force causes electricity and magnetism?
Electromagnetic force
300
What is the scientific unit that is used to measure force and weight?
The newton (N)
300
What word describes any object that produces a magnetic field?
Magnet
300
What word describes substances that are very weakly attracted to magnets?
Paramagnetic materials include aluminum, tin, and platinum.
300
What word describes the force exerted by an object being pulled in opposite directions?
Tension
300
What word describes an example of drag that is demonstrated by a parachute slowing the descent of a skydiver?
Air resistance
300
What word describes an object's resistance to a change in motion?
Inertia
Newton's first law of motion is sometimes called the law of inertia
400
What can a force do?
(1) make an object start or stop moving,
(2) change the speed of an object that is moving,
(3) change the direction an object is moving,
(4) change the shape or size of an object
400
What force attracts objects in the universe toward one another?
Gravitational force (or gravity)
400
What tool can be used to measure force and weight?
A spring scale or a spring balance
400
What word describes what happens when magnets whose north poles are placed near each other?
Like poles repel.
400
What word describes materials that are repelled by both ends of a magnet? (In other words, items that are not attracted to magnets)
Diamagnetic materials include copper, gold, zinc, mercury, plastic, rubber, wood, glass, water, and air.
400
What word describes the force a stretched or compressed spring exerts on whatever is stretching or compressing it?
Spring force
400
What word describes the force a moving fluid exerts as it flows around an object?
Lift
400
Which law states that the acceleration of an object depends on the mass of the object and the strength of the force that acts on it?
Newton's second law of motion
500
Physicists have identified four non-contact forces that affect all matter in the universe. What is an example of a non-contact force?
(1) strong nuclear force
(2) electromagnetic force
(3) weak nuclear force
(4) gravitational force (or gravity)
500
What two things does the effect of an object's gravitational force depend upon?
(1) the masses of the objects, and
(2) their distances apart
The more massive an object is, and the closer the objects are to each other, the more gravitational force attracts them.
500
On the surface of Earth, an object with a mass of 1kg has a weight of about how many newtons?
9.81 N (or about 10 N)
500
What word describes what happens when the north pole of one magnet is placed near the south pole of another magnet?
Unlike poles attract.
500
What word describes Earth's magnetic field, which is caused by the large amount of liquid iron and nickel in the Earth's outer core?
Earth's magnetosphere
500
What word describes the force that opposes motion when two surfaces are in contact with one another?
Frictional force, or friction
STATIC FRICTION makes it difficult to start an object moving.
KINETIC FRICTION can slow down or stop a moving object.
500
What word describes the force of a fluid opposing a force applied by a propeller, turbine, rocket, or other object?
Thrust
500
Which law states that every action has an equal and opposite reaction?
Newton's third law of motion