Force

1
Force Game!
Force Game!
2
The unit of measure for force is
The Newton (N) in honor of Sir Isaac Newton!
3
What are the two parts to every force?
20 N
Box
Magnitude and Direction!
4

• What causes all motion to start or stop?

Force!
5
What is the net force for this piano?
200 N
200 N
0 N, the forces cancel out so the piano isnt
moving!
6
If forces are acting in the SAME direction, the
magnitude is
5 N
10 N
Chair
Added! 5 N 10 N 15 N --gt
7
An objects resistance to change its motion is
called
Inertia!
8
When the floor is wet, it is more slippery
because
It is so smooth that there is not enough
friction, so you slide!
9
How would we diagram the 6 N force of gravity
that this squirrel is feeling?
With a labeled box, a down arrow, and the
magnitude!
Squirrel
6 N
10

• What is the net force for this owl?

25 N
5 N
20 N --gt
11
We are able to walk, run, and jump because when
we push on the ground
The ground pushes back!
12
For every action there is an equal and opposite
reaction is which of Newtons Laws of Motion?
Newtons 3rd Law!
13
An object in motion stays in motion, and an
object at rest stays at rest unless acted on by a
force (force starts and stops motion) is which
of Newtons Laws of motion?
Newtons 1st Law!
14
A force that acts in the opposite direction of
motion is called
10 N
1 N
Friction!
15
A tissue falls slower than the same mass
paperclip because of
Air resistance friction! The tissue keeps
getting caught on the air molecules.
16
What creates an increase in the magnitude of
friction between two objects?
More of the surfaces touching, and a bumpier
surface!
17
How much more force is needed to move this
giant rock?
291 N
Giant Rock
300 N
More than 9 Newtons (such as 9.1 N, 10 N, etc.)
18
The use of strength, which is usually a push or a
pull, is known as
Force!
19
According to Newtons 1st law of Motion, what
will happen when the skateboard hits the rock and
stops?
He will keep going and fly off the skateboard!
20
Force Mass x Acceleration is which of
Newtons Laws of Motion?
Newtons 2nd Law!
Tibby!
21
What happens to an object thrown from a moving
vehicle?
It keeps going at the same speed until it hits
the ground!
22
The measure of how strong a force is is called
its
Magnitude!
23
How can you decrease the amount of air resistance
a falling object has, and speed up its fall?
Make it narrow or thinner!
24
How can you increase the amount of air resistance
a falling object has, and slow its fall?
Spread it out to make it bigger and wider!
25
If forces are acting in DIFFERENT directions,
the magnitude is
5 N
10 N
Chair
Subtracted! 10N - 5N 5 N --gt
26
According to Newtons 2nd law, what will make an
object have MORE force?
More mass (heavier) or more acceleration (faster)!