Motion and Forces
Question – Vocabulary
•What is velocity?
Answer
•Velocity is speed with
direction.
Question – Vocabulary
•What is force?
Answer
•Force is a push or a pull.
Question – Vocabulary
•What is weight?
Answer
•Weight is the result of
gravity acting on an
object.
Question – Vocabulary
•What is inertia?
Answer
•Inertia is the tendency of
an object to resist a
change in motion;
determined by the
object’s mass.
Question – Vocabulary
•What is acceleration?
Answer
•Acceleration is the
speeding up, slowing
down, or changing
directions.
Question – Newton
•What is another name for
Newton’s 1st Law of
Motion?
Answer
•Law of Inertia
Question - Newton
•Which Law of Motion
states…
For every action, there is
an equal and opposite
reaction.
Answer
•Newton’s
Motion
rd
3
Law of
Question - Newton
•Which Law of Motion
states…
An object at rest will stay
at rest and an object in
motion will stay in motion,
unless acted upon by an
unbalanced outside force.
Answer
•Newton’s
Motion
st
1
Law of
Question - Newton
•Which Law of Motion
states…
F=m●a
Answer
•Newton’s
Motion
nd
2
Law of
Question – Force
•When forces act in the
same direction, how can
you find its net force?
Answer
•The net force can be
found by adding the
strengths of their
individual forces together.
Question - Force
•In a game of tug-o-war
Team Fids pulls with a
force of 1200N and Team
Lids pulls with a force of
1600N, who wins and by
how much?
Answer
•Team Lids, of course, by
400 N!
Question – Force
•What is the net force of
two tugboats moving a
barge each with a force
of 15,000N?
Answer
•15,000N + 15,000N =
30,000N
Question - Force
•What type of force result
in a change of motion?
•What type of force result
in no change of motion?
Answer
•Change of motion –
Unbalanced Forces
•No Change in motion –
Balanced Forces
Question - Force
•If you had two equal
forces in opposite
direction, are they
considered balanced or
unbalanced?
Answer
•Balanced
Question - Motion
•An object is in motion if it
changes position relative
to what?
Answer
•Reference Point
Question - Units
What is the unit for
•Mass
•Force
•Acceleration
•Distance
•Time
•Velocity
Answer
• Mass – gram (g)or kilogram (kg)
• Force – Newton (N)
• Acceleration – meters per second squared
(m/s²)
• Distance – meter (m) or kilometer (km)
• Time – seconds (sec) or hours (hr)
• Velocity – meters per second (m/s)
• Speed – meters per second (m/s)
Question - Friction
•The strength of the force
of friction depends on
what two factors?
Answer
•How hard objects push on
one another.
•The types of surfaces
involved.
Question - Friction
•How does sliding friction
occur and give at least
one example?
Answer
•Sliding friction occurs
when an object slides
over another.
•Example: Sledding, Ballet
dancing
Question - Friction
•How does rolling friction
occur and give at least
one example?
Answer
•Rolling friction occurs
when an object rolls over
a surface.
•Examples: Skating, Riding
a bike, Skateboarding.
Question – Friction
•How does fluid friction
occur and give at least
one example?
Answer
•Fluid friction occurs when
an object moves through
the air or water.
•Examples: Surfing, Oiled
Machinery
Question - Friction
•How does static friction
occur and give at least
one example?
Answer
•Static friction occurs
when objects are not
moving.
•Examples: Pushing a table
across the floor.
Question - Gravity
•What force of attraction
between two objects
varies with what two
factors?
Answer
•Mass and Distance
Question - Gravity
•What does the Universal
Law of Gravitation state?
Answer
•The Universal Law of
Gravitation states that all
objects in the universe are
attracted to one another.
Question - Gravity
•Gravity on Earth causes
objects to fall at a rate
of….
Answer
•9.8 meters per second
squared (9.8m/s²)
Question - Mass
•What happens to a
person’s mass on the
Moon if on Earth their
mass is 44.5kg?
Answer
•It stays the same.
Question – Acceleration
•What are two factors that
would accelerate a
bowling ball down the
alley?
Answer
•Increase the force
•Decrease the mass
Question - Momentum
•What two factors affect
momentum?
Answer
•Mass and velocity