| Force | Friction 1 | Friction 2 | Gravity 1 | Gravity 2 |
| 5 | 5 | 5 | 5 | 5 |
| 10 | 10 | 10 | 10 | 10 |
| 15 | 15 | 15 | 15 | 15 |
| 20 | 20 | 20 | 20 | 20 |
| 25 | 25 | 25 | 25 | 25 |
| Final Question | ||||
What is force?
What is force?
Force is a push or a pull
Name the force that slows down motion.
Name the force that slows down motion.
The force that slows down motion is called friction.
Which force is always pulling - never pushing- objects?
Which force is always pulling - never pushing- objects?
The pulling force is called Gravity.
What do we call two or more forces that are act on objects and cause them to move?
What do we call two or more forces that are act on objects and cause them to move?
Unbalanced forces
What is it called when all forces are acting an object an object and there is NO change in motion?
What is it called when all forces are acting an object an object and there is NO change in motion?
Balanced Forces
Friction is a force that is always _____________ things down.
A. pulling
B. slowing
C. moving
Friction is a force that is always _____________ things down.
A. pulling
B. slowing
C. moving
B. Slowing
Name three ways you can reduce friction.
Name three ways you can reduce friction.
reduce surface area
add a lubricant
create smoother surfaces
reduce mass
Where is friciton happening in this photo?
Where is friciton happening in this photo?
Answers will vary.
Name one way these boys reduce the friction between the sled and the surface.
Name one way these boys reduce the friction between the sled and the surface.
Answers will vary.
What type of friction is this swimmer experiencing?
What type of friction is this swimmer experiencing?
Fluid Friction
Answers will vary.
Name three ways you can increase friction.
Name three ways you can increase friction.
Add surface area
make surfaces rough
Add mass
Name the three types of friction.
Name the three types of friction.
Sliding
Rolling
Fluid
What can this poor fella do to increase friction on the surface?
What can this poor fella do to increase friction on the surface?
Answers will vary
What type of friciton is used to help move this refrigerator?
What type of friciton is used to help move this refrigerator?
Rolling friciton
The pull of gravitiy depends on two things. What are they?
The pull of gravitiy depends on two things. What are they?
mass and distance
Which object below would have the greatest gravitational pull?
feather
dump truck
couch
Which object below would have the greatest gravitational pull?
feather
dump truck
couch
dump truck
What is the name of this building AND what country is it in?
What is the name of this building AND what country is it in?
Tower of Pisa. It is in Italy.
DAILY DOUBLE!!!!
DAILY DOUBLE!!!!
Three objects are on the moon: ping-pong ball, watermelon and a bowling ball.
They all have parachutes and are dropped from the top of the rocket.
Which object will fall to the moon the fastest?
Because there is no air on the moon, objects fall
A. at different speeds
B. at the same speed
C at slower speed
Because there is no air on the moon, objects fall
A. at different speeds
B. at the same speed
C at slower speed
B. at the same speed
Is weight and mass the same thing?
Is weight and mass the same thing?
Nope
Pretend you landed on Jupiter. What would change:
A. weight
B. Mass
C. weight and mass
D. neither would change
Pretend you landed on Jupiter. What would change:
A. weight
B. Mass
C. weight and mass
D. neither would change
A. only your weight would change.
Name the scientist that proved objects fall at the same rate.
Name the scientist that proved objects fall at the same rate.
Galileo
Name one reason why gravity is a good thing.
Name one reason why gravity is a good thing.
Answers will vary.
Explain why a feather falls to the ground more slowiy than a bowling ball.
Explain why a feather falls to the ground more slowiy than a bowling ball.
It has more air friction.
Explain why a hammer and a feather fall at different speeds on earth but not on the moon.
Explain why a hammer and a feather fall at different speeds on earth but not on the moon.
Threre is no atmosphere on the moon so there is no air friction to slow things down. All objects fall at the same rate on the moon.
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