Problem: You are testing a new amusement park roller coaster with an empty car with a mass of 120 kg. One part of the track is a vertical loop with a radius of 12.0 m. At the bottom of the loop (point A) the car has a speed of 25.0 m/s and at the top of the loop (point B) it has speed of 8.00 m/s. You may want to review (Pages 203 - 212).For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of A vertical circle with friction. As the car rolls from point A to point B, how much work is done by friction?

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Problem Details
You are testing a new amusement park roller coaster with an empty car with a mass of 120 kg. One part of the track is a vertical loop with a radius of 12.0 m. At the bottom of the loop (point A) the car has a speed of 25.0 m/s and at the top of the loop (point B) it has speed of 8.00 m/s.

You may want to review (Pages 203 - 212).

For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of A vertical circle with friction.

As the car rolls from point A to point B, how much work is done by friction?

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Our tutors have indicated that to solve this problem you will need to apply the Motion Along Curved Paths concept. You can view video lessons to learn Motion Along Curved Paths. Or if you need more Motion Along Curved Paths practice, you can also practice Motion Along Curved Paths practice problems.