A disc rolls without slipping on a horizontal surface. If its radius is R and it

Practice Questions

Q1
A disc rolls without slipping on a horizontal surface. If its radius is R and it rolls with a linear speed v, what is its angular speed?
  1. v/R
  2. 2v/R
  3. v/2R
  4. v^2/R

Questions & Step-by-Step Solutions

A disc rolls without slipping on a horizontal surface. If its radius is R and it rolls with a linear speed v, what is its angular speed?
  • Step 1: Understand that when a disc rolls without slipping, there is a connection between its linear speed (v) and its angular speed (ω).
  • Step 2: Recall the formula that relates linear speed and angular speed for rolling objects: ω = v/R.
  • Step 3: Identify the variables: R is the radius of the disc, and v is the linear speed.
  • Step 4: To find the angular speed (ω), simply divide the linear speed (v) by the radius (R).
  • Step 5: Write the final formula: ω = v/R.
  • Rolling Motion – The relationship between linear speed and angular speed for an object rolling without slipping.
  • Angular Speed – The rate of rotation of an object, typically measured in radians per second.
  • Linear Speed – The speed at which the center of mass of the rolling object moves along a path.
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