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15
×
The steeper the angle of an inclined plane the __________ the vehicle will move.
Faster
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heart
Other team wins 25 points!
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magnet
Take 25 points!
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fairy
Take points!
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25
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banana
Go to last place!
Oops!
15
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A device for doing work in which a force which is applied at one point to overcome a force at another point is called...
A machine!
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15
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What is potential energy?
Energy which is stored by an object.
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20
×
What are water wheels used for?
Water wheels are used to produce energy.
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lifesaver
Give 25 points!
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star
Double points!
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fairy
Take points!
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25
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thief
Give points!
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20
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An object will stay at rest or keep moving unless...
...something interrupts it.
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20
×
What is an efficient machine?
An efficient machine uses the LEAST amount of energy possible
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20
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How is potential energy created in a homemade catapult using an elastic band?
As you twist the elastic you are exerting energy. This energy is stored in the twisted elastic.
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25
×
Thinking about our "Working Wheels" project, we learned that water at a higher level has what kind of energy?
Potential energy
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25
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How can a simple crane with a pulley system and a crank make it easier to lift heavy objects?
The pulley system changes the direction of the force to make it more convenient to lift the load.
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15
×
What is speed?
The measurement of how fast an object moves.
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banana
Go to last place!
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star
Double points!
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shark
Other team loses 10 points!
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thief
Give points!
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25
15
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What is an axle?
The shaft at the center of the wheel.
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20
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What kind of energy changes motion/position of an object?
Mechanical Energy
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20
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What are 3 ways to reduce friction?
1.Use smooth and hard surfaces. 2. Minimize surface contact. 3. Stabilize moving parts. 4. Reduce tension at moving parts. 5. Use lubricant.
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