Revolutions and radius of wheel

Click For Summary
SUMMARY

The problem involves calculating the radius of a wheel based on the distance a string is pulled and the number of revolutions made by the wheel. The key relationship is between the circumference of the wheel and the radius, where the circumference can be determined by the formula: Circumference = Length of string pulled / Number of revolutions. This relationship allows for the calculation of the radius using the formula: Radius = Circumference / (2π).

PREREQUISITES
  • Understanding of basic geometry, specifically the relationship between circumference and radius.
  • Familiarity with rotational motion concepts in physics.
  • Knowledge of kinematic equations and their applications.
  • Ability to manipulate algebraic equations to solve for unknown variables.
NEXT STEPS
  • Study the formula for circumference and its application in circular motion.
  • Learn about the relationship between linear distance and angular displacement in rotational dynamics.
  • Explore kinematic equations related to rotational motion.
  • Practice solving problems involving the calculation of radius from given linear and rotational parameters.
USEFUL FOR

Students studying physics, particularly those focusing on mechanics and rotational motion, as well as educators looking for examples of practical applications of geometry in physics problems.

rcmango
Messages
232
Reaction score
0

Homework Statement



A string is wound tightly around a wheel. When the end of the string is pulled through a distance of ? cm, the wheel rotates through ? revolutions. What is the radius of the wheel?




Homework Equations





The Attempt at a Solution



i'm confused about this simple problem because i believed that displacement and revolutions were the same for theta in a kinematics problem like this: theta = 1/2(w0 + w)t

what equation would I use to solve such a problem.
 
Physics news on Phys.org
All you need is the relationship between circumference and radius. You get the circumference from the length of string pulled and the number of revolutions.
 

Similar threads

  • · Replies 25 ·
Replies
25
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
Replies
4
Views
2K
Replies
7
Views
2K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
Replies
17
Views
1K
Replies
8
Views
3K
  • · Replies 44 ·
2
Replies
44
Views
7K