# How To Calculate Net Force

```Tuesday, 3/3/14
Day 2
1. Please have these
Items on your desk.
Science
Starters
Sheet
Agenda
AR
Book
2- Fill out your Agenda.
3. Science Starter:
What does Newton’s first law state? Give an
example.
4- When you are done, read your AR book.
T.O.C- Update
• Pages 35/36
3/4
How to Calculate Net Force
How To Calculate
Net Force
What is a force?
• Force is a push or pull in a particular direction.
Forces can affect motion in several
ways:
• They can:
1. make objects start
moving
2. Move objects faster
or slower
3. Stop objects
4. change direction
FORCE FACTS:
1. Measured in Newton's (N)
2. Forces usually act in pairs
3. Forces act in a particular
direction
4. Usually cannot be seen
How to Calculate Net Forces
• When two forces act
in the same direction
on an object, the net
force is equal to the
sum of the two
forces
8N
6N
14N
How to Calculate Net Forces
Continued
• When two unequal
forces act in opposite
directions on an
object, the net force
is the difference of
the two forces
18N
50N
32N
Left
Force, Mass, Acceleration
• Force = Mass x Acceleration
F= ma
F
ma
How much force is required to accelerate a 50
kg mass at 4 m/s2?
F=
?
F=
M= 50 kg
A= 4 m/s
F=
200 N
50 kg * 4 m/s
What is the acceleration of a 7 kg mass being pulled
by a 56 N force?
F=
56N
F=ma
56N = 7 kg *
M= 7 kg
A=
?
8 m/s
?
What is the mass of a block accelerating at 2
m/s2 and pushed by a 9 N force?
F=
9N
M= ?
F=ma
9N
A = 2 m/s
4.5 kg
=
? *
2 m/s
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IMPORTANT: PLEASE MAKE SURE STUDENTS ARE AWARE OF THE CHANGE TO #14 ON THE ACADEMIC
IMPORTANT: PLEASE MAKE SURE STUDENTS ARE AWARE OF THE CHANGE TO #14 ON THE ACADEMIC
VOCABULARY ASSESSMENT
VOCABULARY ASSESSMENT
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14. Which sentence uses illustrate correctly?
a. The book was beautifully illustrate by a famous artist from Europe.
14. Which sentence uses illustrate correctly?
b. Let me illustrate what I mean by telling you a story from my childhood.
a. The book
illustrate
famous
artist
from
Europe.
c. Youwas
needbeautifully
to be illustrate
when you by
are atrying
to explain
your
topic.
d. I’m
not sure.what I mean by telling you a story from my childhood.
b. Let me
illustrate
c. You need to be illustrate when you are trying to explain your topic.
d. I’m not sure.
```