Question
Asked Oct 18, 2019
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A 120-g toy car is propelled by a compressed spring that starts it moving. The car follows the curved track in the figure.

 

What is the final speed in m/s and it coasts up to the frictionless slope, gaining 0.085 meters in altitude. 

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Expert Answer

Step 1

the conservation of energy is 

1
mu
1
v
2 =mgh+m
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1 mu 1 v 2 =mgh+m

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Step 2

Here, u is the initial  speed,  v is the final speed.

rew...

1
mu
mv
2
1
-mgh
gh
Vu?-gh
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1 mu mv 2 1 -mgh gh Vu?-gh

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