SparkNotes Shopping Cart  |     |  Checkout
Brought to you by Barnes and Noble
Rotational Dynamics
  
 
Problems
Problem 1.1: Calculate the net torque exerted by F1 = 30 N and F2 = 50 N in the figure below. You may assume that both forces act on a single rigid body.
Two forces acting on a single rigid body
[Solution]
Problem 1.2:
Two cylinders of the same mass and shape, one hollow and one solid, are set on a incline and allowed to roll down. Which cylinder will reach the bottom of the incline first? Why?
[Solution]
Problem 1.3:
A simple pendulum of mass m on a string of radius r is displaced from vertical by an angle θ, as shown below. What is the torque provided by gravity at that point?
A gravitational force acting on a simple pendulum
[Solution]
Problem 1.4:
See the last problem. What is the angular acceleration of the pendulum at that point?
[Solution]
Problem 1.5:
A revolving door is common in office buildings. What is the magnitude of the torque exerted on a revolving door of mass 100 kg if two people push on opposite sides of the door with a force of 50 N at a distance of 1 m from the axis of the door, as shown below? Also, the moment of inertia of a revolving door is given by I = . Find the resultant angular acceleration assuming no resistance.
Two people pushing on a revolving door
[Solution]
Help | Feedback | Make a request | Report an error | Send to a friend
 
For students sick of scribbling geometry concepts on index cards, SparkNotes Study Cards are the answer.
More...
 
Study right for the SAT II Chemistry test with the experts at SparkNotes.
More...
 
 
Go to top