Newton’s 1st Law
Newton’s 2nd Law Newton’s 3rd Law
F = ma
P = mv
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One word to describe
this, Newton’s 1st law.
What is INERTIA?
An object with a small
mass has what kind of
inertia?
What is small inertia?
When traveling in a car
which stops suddenly,
what happens to the
passengers?
What is, they continue
to move forward.
State Newton’s entire
st
1 law.
What is an object at
rest remains at rest
and an object in
motion remains in
motion unless acted on
by an unbalanced force
Should child safety
seats have age or
weight restrictions,
why?
What is, kids develop
at different rates, an
older child may still not
weigh very much.
If 2 objects are accelerating
at the same rate & I used
the same force to put each of
them in motion, what do you
know about the mass of each
object?
What is, they are of equal mass.
You push an empty cart and a
full cart, you use the same
amount of force on each, which
one will have a greater
acceleration?
What is the empty cart.
Unbalanced forces cause
changes of what?
What is motion or acceleration.
State Newton’s 2nd Law.
An unbalanced force action on
an object equals the objects
mass times its acceleration.
The force that causes a space
shuttle to accelerate is exerted
on the shuttle by what?
What is the exhaust gas pushing
against the shuttle.
Here, Newton says that all
forces occur in what?
What is pairs?
Force pairs act on the same
object, true or false?
What is false?
In this picture, what is the
action/reaction pair of forces?
What is bird wings action force,
air reaction force.
State Newton’s 3rd law
For every action there is an
equal and opposite reaction.
Give 2 NEW examples of action
reaction forces, not talked about
in class.
Fingers on a keyboard, baseball
bat and a baseball, a suspension
bridge pulls on cables and they
pull back.
What does the “a” in this
formula mean? F = ma
What is acceleration
What are the units for force?
What is a N or kg m /s2
What force is necessary to
accelerate a 1250 kg car at a
rate of 40 m/s2?
What is 50,000 N
The net force action on a 5 kg
discus is 50 N. What is the
acceleration?
What is 10 m/s2
A block pushed with a force of
13.5 N accelerates at 6.5 m/s2 to
the left. What is the mass of the
block?
What is 2.1 kg
In this formula the SI
unit for p is?
What is kg x m /s
What does p stand for?
What is momentum
Calculate the p of a speed skater
with a mass of 75 kg and a
speed of 16 m/s.
What is 1200 kg x m/s forward.
Calculate the velocity of a 0.8 kg
kitten with a momentum of 5 kg
m/s forward.
What is 6.3 m/s forward
Calculate the momentum in kg x
m/s of a 9.1 kg toddler who is
riding in a car moving east at 89
km/hr. You will need to do a
couple of conversions!
What is 225 kg m /s