Circular Motion (high school level)

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SUMMARY

The discussion focuses on calculating the speed and centripetal acceleration of a rider on a carnival ride with a 2.0 m radius that completes one rotation every 0.90 seconds. The speed of the rider is determined to be 141 m/s, and the centripetal acceleration is calculated at 98 m/s². The centripetal acceleration is produced by the net force acting towards the center of the circular path, which is essential for maintaining circular motion. The equations used include ac = v²/r, T = 1/f, and Fc = m(4π²r/T²).

PREREQUISITES
  • Understanding of circular motion concepts
  • Familiarity with the equations of motion for circular dynamics
  • Basic knowledge of angular velocity and its relation to linear velocity
  • Ability to manipulate algebraic equations for solving physics problems
NEXT STEPS
  • Learn how to derive angular velocity from rotational period
  • Study the relationship between linear speed and radius in circular motion
  • Explore the concept of centripetal force and its applications
  • Investigate real-world examples of circular motion in amusement park rides
USEFUL FOR

High school physics students, educators teaching circular motion, and anyone interested in the physics behind amusement park rides.

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Homework Statement


The carnival ride shown in Figure 7-18 has a 2.0 m radius and rotates once each .90 s

a. Find the speed of the rider.
b. Find the centripetal acceleration of the rider.
c. What produces this acceleration?
SOLUTIONS PROVIDED:
a. 141
b. 98
c. --Explain--

Homework Equations



ac=v^2/r
T=1/f
Fc=m(4pi^2r/T^2)

The Attempt at a Solution


I apologize for not using script, I was having a bit of difficulty. However, this is what I got.
.90=v^2/2
√v
=1.34
Completely wrong, please help.
 
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You didn't really provide a diagram, so I am assuming it is one of those rotating cylinder things.

For the speed of the rider, it tells you that the ride rotates ever 0.9s,, can you figure out the angular velocity from this? Given that you found that and have the radius, how do you get the velocity v from these two quantities?
 

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