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Katena32 [7]
3 years ago
9

A roller coaster starts from rest at point a and continues to point b on a frictionless track. what best describes the changes i

n kinetic and potential energy as the car travels from point a to point b?
Physics
2 answers:
IceJOKER [234]3 years ago
5 0

Took a wild guess and got it correct. The answer is B Kinetic Energy increases and potential energy decreases.

saw5 [17]3 years ago
3 0

<span>At first when the car is at the datum point where is no elevation, the kinetic energy increases while the potential energy is zero. As it travel the path and goes upward the kinetic enrgy decreases while the potential energy increases. When it goes down again the kinetic enrgy increases again while the potential energy decreases </span>

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Ilia_Sergeevich [38]
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3 0
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a heavy jar sits on top of a 3.4 m shelf with a gravitational potential energy of 180 j. What is the mass of the jar?
sp2606 [1]

Answer:

5.2941176471 kg or 5294.1 grams

Explanation:

g.p.e= mgh

g.p.e/gh=m

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DanielleElmas [232]

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option A

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the correct answer is option A

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consider a solid sphere and a solid disk wiht the same radius and the same mass. explain why the solid disk has a greater moment
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Moment of inertia of the solid sphere:

I

s

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2

5

M

R

2

.

.

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.

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(

1

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Is=25MR2...........(1)

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