Objective
A force is either a push or a pull. The motion of
objects can be changed by forces. The size of
the change is related to the size of the force.
The change is also related to the mass of the
object on which the force is being exerted.
When an object does not move in response to
a force, it is because the environment is
applying another force.
Double click here >
•
This bus is in motion. It moved
from one place to another. Objects
are in motion everyday.
Question: If this was a real
bus, how did it start in
motion?
1. The wind
2. The motor
3. No reason
Incorrect!
Click here to try again!
Correct!
The motor! The bus cannot move on it’s own. It
needs something to start the motion- The motor
is the force needed to start the bus!
•Click
to learn about force!
What is force?
•
Force is a push or pull needed to
start an object moving.
Think about a door. The door will stay in the
same place unless something like your hand
or the wind pushes or pulls it closed.
Question: Is it possible for
an ant to move a brick?
1. Yes
2. No
Incorrect!
Click here to try again!
Correct!
No, an ant isn’t strong enough to move a brick.
For an object to move, the amount of force has
to be strong enough to move it.
•Continue
to learn more about motion!
Describing Motion
•
Now that we know what motion is
and force causes motion, let’s talk
about how to describe it!
You can describe motion with 3 types of words:
1. Type of motion
2. Speed
3. Direction
Type of Motion Words
These words describe what kind of motion it is:
•
running
•
jumping
•
skiing
•
climbing
Speed Words
These words describe the speed of the motion:
•
fast
•
quick
•
slow
•
rapidly
Direction Words
These words describe the direction of the
motion:
•
left
•
up
•
sideways
•
north
Question: How would you
describe the type of motion
this rabbit is doing?
1. Hopping
2. Rolling
3. Swimming
Incorrect!
Click here to try again!
Correct!
The type of motion is hopping!
Question: How would you
describe the speed of a
turtle?
1. Quick
2. Fast
3. Slow
Incorrect!
Click here to try again!
Correct!
The speed of a turtle is slow!
Question: What direction are
these fish swimming?
1. Right
2. Left
3. Up
Incorrect!
Click here to try again!
Correct!
The direction the fish are swimming is left!
Review
Motion occurs when an object moves from one
place to another.
For motion to occur, there has to be a force on
the object.
A force is a push or pull.
The force has to be stronger than the object.
•Got
it- Click here
•Confused
or want to know more- Click here!
Confused? Check this
out!
•
Push and Pull
Congrats!