• Support PF! Buy your school textbooks, materials and every day products via PF Here!

Circular Motion and Gravitation HELP!

  • Thread starter kittn44
  • Start date
1
0
Hey there! Completely new here but thought someone could help. I have this problem where I don't even know where to start from.

The problem:

(Picture of loop with a man in a roller coaster cart hanging upside down from furthest top point of circle)

A man in the roller coaster is sitting on a bathroom scale. If he is traveling at 33.1 m/s at the point shown, the radius of the vertical coaster track is 61 meters, and the man has a mass of 55.3 kg, to the nearest newton, what does the scale read?

Ok, first off, the answer isn't something I'm concerned with anyway because these values will not be the same as the ones I end up having to work, so I really just need someone to explain HOW I do this and WHY. My class is only 5 weeks long and I'm taking too much in and I just don't grasp circular motion quite yet. Any ideas and help appreciated!

Also, if the man were at the most bottom point of the loop, would you work the problem differently?

THANKS :smile:
 
788
0
The acceleration for circular motion can be defined as:

[tex]a = \frac{v^2}{r}[/tex]

where "a" is acceleration, "v" is velocity, and "r" is the radius.

Now once the acceleration is known, how might one find the force acting on the scale?
 

Related Threads for: Circular Motion and Gravitation HELP!

Replies
7
Views
10K
  • Posted
Replies
3
Views
2K
Replies
2
Views
5K
Replies
5
Views
1K
  • Posted
Replies
3
Views
2K
  • Posted
Replies
4
Views
578
Replies
5
Views
2K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top