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15
×
What two measurements are needed to calculate average speed?
distance and time
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15
×
What is an example of an unbalanced force?
a book laying on the desk
a cat sitting on a chair
a boy jumping off his bike
an alligator sleeping in the sun
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15
×
Forces that produce a nonzero net force, which changes an object's motion:
unbalanced force
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eraser
Reset score!
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magnet
Take 25 points!
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rocket
Go to first place!
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lifesaver
Give 25 points!
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15
×
A boy rides a skate board down a hill. Eventually the skate board stops. Which is most responsible for causing the skateboard to stop?
friction acting on the skateboard
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15
×
How does a wagons motion change when additional force is applied?
as forces increases, the wagon direction changes
as force increases, acceleration decreases
as force increases, acceleration increases
as forces increases, the wagon's mass changes
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15
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A force that one surface exerts on another when the two surfaces rub against each other and causes objects to slow down or stop.
friction
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banana
Go to last place!
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rocket
Go to first place!
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fairy
Take points!
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25
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thief
Give points!
5
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25
15
×
A unit of measure for force is called:
Newtons
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banana
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shark
Other team loses 20 points!
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shark
Other team loses 25 points!
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lifesaver
Give 10 points!
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15
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How does the mass of an object affect acceleration?
none of the above
The greater the mass of an object the smaller the force nee
The greater the mass of an object the greater the force nee
the smaller the mass of an object the greater the force need
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15
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A book falls off the desk. What moves the book towards the floor?
gravity
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15
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Which best represents a unit for speed? Meters
m/sec
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15
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A snow plow uncovered 100 miles of road in 4 hours . What was the average speed of the plow? (speed = distance divided by time)
25 mph
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heart
Other team wins 15 points!
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gold
Win 50 points!
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fairy
Take points!
5
10
15
20
25
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banana
Go to last place!
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15
×
The tendency of an object to resist any change in its motion is:
inertia
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