U2C2A2 Record Sheet Key Question: How can you change the motion energy of an object? In other words,...
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Transcript of U2C2A2 Record Sheet Key Question: How can you change the motion energy of an object? In other words,...
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U2C2A2Record Sheet
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Key Question: How can you change the motion energy of an object?
In other words, what happens to cause an object to increase or decrease in motion?
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Explore Your Ideas
p 159
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Explore Your Ideas
Refer to How to Identify How to Identify Mechanical InteractionsMechanical Interactions
pages 638-639pages 638-639
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What is the interaction between the girl and the bike?
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Explore Your Ideas
Step 1
p 160
* students need 5 min to complete the chart
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net & soccer ball
elastic Ball slows down
Ball’s motion energy decreases
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player & ground
friction Player slows down
Player decreases in motion energy
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Parachute/
car & airdrag Parachute
/car slows down
Parachute/car
decreases in motion energy
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Explore Your Ideas
Step 2
bottom of page 160
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Objects you may SAFELY use:parachuter (see teacher)parachuter (see teacher)
bouncy ballbouncy ball
pinpin ballball machinemachine
nerf footballnerf football
rubberrubber bands (see teacher)bands (see teacher)
hot wheel carshot wheel cars
noise-makernoise-maker
paper airplane (yellow paper)paper airplane (yellow paper)
paddle-ballpaddle-ball
a piece of styrofoama piece of styrofoam
blockblock
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2. Draw a sketch of each set-up
applied friction drag elastic
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Objects you may SAFELY use:parachuter (see teacher)parachuter (see teacher)
bouncy ballbouncy ball
pinpin ballball machinemachine
nerf footballnerf football
rubberrubber bands (see teacher)bands (see teacher)
hot wheel carshot wheel cars
noise-makernoise-maker
paper airplane (yellow paper)paper airplane (yellow paper)
paddle-ballpaddle-ball
a piece of styrofoama piece of styrofoam
blockblock
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appliedapplied
frictionfriction
dragdrag
elasticelastic
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appliedfriction
dragelastic
Which types of mechanical interactions decrease motion energy?
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Make Sense of Your ideas1. In general, how can you increase the motion
energy of an object?
You can increase the motion energy of an object when the source transfers energy INTO to receiver. Example:
2. In general, how can you decrease the motion energy of an object?
You can decrease the motion energy of an object when the energy is transferred OUT of the object. Example:
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Our Consensus IdeasHow can you change (increase or decrease) the motion energy of an object?
Mechanical interactions (applied, friction, drag, elastic) can cause changes in motion energy. An object will increase in motion energy when it receives a push or pull from the source. Also, an object will decrease in motion energy when it transfers energy to the receiver.