
CAST Practice 1
Presentation
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Science
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6th - 8th Grade
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Practice Problem
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Hard
+2
Standards-aligned
Christine Boudreau
Used 18+ times
FREE Resource
3 Slides • 6 Questions
1
CAST Practice 1
By Christine Boudreau
2
Multiple Choice
At boxing practice, Nathan works with his coach to improve the strength of his punch. Nathan says that the reason the bag is heavy is so that it can absorb plenty of elastic potential energy. Is he correct?
Yes, he is correct.
No, the bag absorbs thermal energy.
No, the bag absorbs gravitational potential energy.
No, the bag is heavy so that its mass will only accelerate a small amount when he punches it.
3
Force = mass x acceleration.
Thermal energy is the total energy of motion in the particles of a substance (it is heat energy).
Gravitational potential energy is potential energy that depends on the height of an object.
Explanation
4
Multiple Choice
Nathan lost his balance when he hit the bag with a hard punch. He says that was because of the reaction force from his punch, which was large because the bag is heavy. Is he correct?
Yes, he is correct.
No, it is not the weight, it is the large mass of the bag that gives the large reaction force.
No, the reaction force depends on the force of Nathan's punch, not on the mass of the bag.
No, the bag does not exert a reaction force, because it is flexible.
5
Newton's third law states that for every action there is an equal and opposite reaction.
Explanation
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CAST Practice 1
By Christine Boudreau
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