next 300 400 500 100 200 forces balanced/ unbalanced work, work, work… ch 4 vocab. this ‘n that...
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300
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100 200Forces
Balanced/ Unbalance
d
Work, work, work…
Ch 4 Vocab.
This ‘n That
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Team OneTeam One
Team TwoTeam Two
Team ThreeTeam Three
Team FourTeam Four
Team FiveTeam Five
Team SixTeam Six
A push or pull that causes motion.
Show Answer
force
100 Back to Board
The force of attraction between all objects.
Show Answer
gravity
200 Back to Board
What kind of force opposes motion?
Show Answer
friction
300 Back to Board
What kind of force is needed to keep your nametags on the side
of your desks?
Show Answer
Magnetic Force
400 Back to Board
Why does Mr. Heinz only weigh 35 pounds
on the moon?
Show Answer
The force of gravity is less on the moon.
Bonus (100pts): Why is the force of gravity less
on the moon than Earth? 500 Back to Board
Because the moon is smaller than Earth.
One puppy pulls on a rope toy. His sister
pulls on the other end with a balanced force.
Does the rope toy move?
Show Answer
NO!
Balanced forces cancel each other out, and
there is no movement.
100 Back to Board
A baseball is sitting on the top of a cone. Are the forces balanced or
unbalanced?
Show Answer
Balanced
Bonus (100pts.) How can you make the
forces unbalanced?
200 Back to Board
Hit the ball!
Mr. Doofus and Mr. Do-right are arm wrestling. Mr. Doofus exerts a force
of 20 N to the left. Mr. Do-right exerts a force of 30 N to the right. What is the
net force?
Show Answer
10 N to the right
Mr. Do-right wins!
300 Back to Board
Why is it easer to lift a heavy weight that is under water, than on
land?
Show Answer
Buoyant forces push up on objects that are in
water.
400 Back to Board
Use the words “buoyant force” to explain why a ping
pong ball floats and a golf ball sinks?
Show Answer
A ping pong ball floats because the buoyant force of water is greater than its
weight.
A golf ball sinks because the buoyant force of water
is less than its weight.500 Back to Board
A bar that makes it easier to move things.
Show Answer
lever
100 Back to Board
True or False?
Simple machines make less work. Why?
Show Answer
False.
Simple machines make work easier, not less
work.
200 Back to Board
Which of the following demonstrates work being done? (list them on your board)
Mr. Heinz pushing against a wall.
Mr. Heinz hammering a nail through a board.
Mr. Heinz riding his bike down the street.
Mr. Heinz jumping on a trampoline.
Mr. Heinz telling you to put your eyes on him.
Mr. Heinz sitting on his stool.
Mr. Heinz opening the door and walking out.
Mr. Heinz reading science homework.
Show Answer
300 Back to Board
Which of the following demonstrates work being done? (put a √ next to any of them)
Mr. Heinz pushing against a wall.
Mr. Heinz hammering a nail through a board.
Mr. Heinz riding his bike down the street.
Mr. Heinz jumping on a trampoline.
Mr. Heinz telling you to put your eyes on him.
Mr. Heinz sitting on his stool.
Mr. Heinz opening the door and walking out.
Mr. Heinz reading science homework.
Match the name of the simple machine to its picture.
Show Answer
1. Inclined Plane
2. Lever
3. Wedge
4. Pulley
5. Wheel and Axle
A
B
C
D
E
400 Back to Board
1. Inclined Plane
2. Lever
3. Wedge
4. Pulley
5. Wheel and Axle
Bonus (100pts): Which simple machine is actually 2 inclined planes put together?
A
B
C
D
E
Which ones are compound machines?
Show Answer
12
7
65
34
500 Back to Board
A device, made only of a few parts that makes
work easier.
Show Answer
Simple machine
100 Back to Board
A ramp or sloping surface.
Show Answer
Inclined Plane
200 Back to Board
A wheel with a groove for a rope.
Show Answer
pulley
300 Back to Board
A device made up of 2 or more simple
machines.
Show Answer
Compound Machine
400 Back to Board
The balance point of a lever.
Show Answer
FulcrumBonus (100pts) Draw an arrow to the fulcrum on this wheel
barrow.
500 Back to Board
What kind of force is acting on this
compass?
Show Answer
Magnetic forces
100 Back to Board
2 tow trucks pull on a bull-dozer toward the right with a
force of 1000 N each.
The bull-dozer pulls left with 1800 N.
Are the forces balanced?
Show Answer
NO!
Bonus (100pts.) What is the net force and
direction?
200 Back to Board
200 N to the right (the direction the tow trucks are pulling)
What type of simple machine is a door
knob?
Show Answer
Wheel and Axle
300 Back to Board
Which simple machine changes the direction of the force applied?
Show Answer
A pulley
You pull down on the rope, and the object
goes up.
400 Back to Board
Show Answer
500 Back to Board
Show Question
Show Answer
You want to move a large, heavy box of toys up into
your treehouse that is very high. It’s too heavy and awkward to carry up the
rope ladder. Which simple machine would help you
move it up the best ? Why?
A pulley is the best because it can be put together easily. An inclined plane would
work, but it’s too hard to put together.
To End
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