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25
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What are the 2 main points stated in Newton's Second Law of Motion?
The greater the force on an object, the greater its change in speed or direction. The heavier an object, the less its change in speed or direction.
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20
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What is an efficient machine?
An efficient machine uses the LEAST amount of energy possible
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heart
Other team wins 15 points!
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gold
Win 50 points!
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shark
Other team loses 5 points!
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baam
Lose 5 points!
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15
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In order for your vehicle or device to move using the least amount of effort you need to reduce __________________.
Friction
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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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thief
Give points!
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25
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fairy
Take points!
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rocket
Go to first place!
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baam
Lose 20 points!
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15
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What is speed?
The measurement of how fast an object moves.
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15
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What is potential energy?
Energy which is stored by an object.
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15
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The steeper the angle of an inclined plane the __________ the vehicle will move.
Faster
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20
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What are water wheels used for?
Water wheels are used to produce energy.
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eraser
Reset score!
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shark
Other team loses 20 points!
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fairy
Take points!
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25
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lifesaver
Give 25 points!
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25
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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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20
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An object will stay at rest or keep moving unless...
...something interrupts it.
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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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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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15
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What is an axle?
The shaft at the center of the wheel.
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