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What is force?
Name the force that slows down motion.
Which force is always pulling - never pushing- objects?
What do we call two or more forces that are act on objects and cause them to move?
What is it called when all forces are acting an object an object and there is NO change in motion?
Friction is a force that is always _____________ things down.
A. pulling
B. slowing
C. moving
Name three ways you can reduce friction.
Where is friciton happening in this photo?
Name one way these boys reduce the friction between the sled and the surface.
What type of friction is this swimmer experiencing?
Name three ways you can increase friction.
Name the three types of friction.
What can this poor fella do to increase friction on the surface?
What type of friciton is used to help move this refrigerator?
The pull of gravitiy depends on two things. What are they?
Which object below would have the greatest gravitational pull?
feather
dump truck
couch
What is the name of this building AND what country is it in?
DAILY DOUBLE!!!!
Because there is no air on the moon, objects fall
A. at different speeds
B. at the same speed
C at slower speed
Is weight and mass the same thing?
Pretend you landed on Jupiter. What would change:
A. weight
B. Mass
C. weight and mass
D. neither would change
Name the scientist that proved objects fall at the same rate.
Name one reason why gravity is a good thing.
Explain why a feather falls to the ground more slowiy than a bowling ball.
Force is a push or a pull
The force that slows down motion is called friction.
The pulling force is called Gravity.
Unbalanced forces
Balanced Forces
B. Slowing
reduce surface area
add a lubricant
create smoother surfaces
reduce mass
Answers will vary.
Answers will vary.
Fluid Friction
Answers will vary.
Add surface area
make surfaces rough
Add mass
Sliding
Rolling
Fluid
Answers will vary
Rolling friciton
mass and distance
dump truck
Tower of Pisa. It is in Italy.
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?
B. at the same speed
Nope
A. only your weight would change.
Galileo
Answers will vary.
It has more air friction.
