Rotation in AP Physics C: Mechanics
What happens to an initially stationary rigid body if only one unbalanced external force acts upon it?
The body will both translate and rotate every time.
The body will remain stationary due to inertia.
The body will translate but not necessarily rotate.
The body will only rotate about its center of mass.
Given a non-uniform bar of length that is in rotational equilibrium while supported at two points and with being at one end of the bar; if supports three times more force than , how far from is point located along the bar?
A carpenter uses a wrench to turn a bolt; knowing the bolt requires a tightening torque that is twice the carpenter can apply alone, what effect does doubling the length of the wrench have on the required force?
Doubling the wrench length halves the required force applied by the carpenter.
Doubling the wrench length would require the same amount of force as in the initial scenario.
Incorrectly spelled word or phrase incorrectly used in the status update (numbered as if they were questions).
In terms of forces causing rotation, what does imply in static equilibrium for a rigid body?
The object has no potential energy
The net external force on the body is zero
Kinetic friction has ceased acting on the object
No net torque is acting on the body
A thin rod with length L pivoted at one end has two small masses attached at its opposite end; if one mass doubles while the other becomes zero, how does this change affect the system's moment of inertia about the pivot?
It remains unchanged.
It increases by four times.
It halves.
It doubles.
A solid cylinder and a hollow cylinder with the same mass and radius are rolling down an incline without slipping; which will reach the bottom first?
The hollow cylinder, because it has a higher moment of inertia.
It cannot be determined without knowing the angle of the incline.
Both at the same time, because they have the same mass and radius.
The solid cylinder, because it has a lower moment of inertia.
How much work is done by external forces holding in place a rod length L horizontally hinged at one end when it’s raised from horizontal position through angle θ given that rod’s mass m is uniformly distributed?

How are we doing?
Give us your feedback and let us know how we can improve
If two particles, each with mass m, are attached at opposite ends of a rigid weightless rod of length L that is free to rotate in space about its center, how much force must be applied perpendicular to one particle to create an angular acceleration ?
Which one of the following quantities is not affected by the choice of pivot point when calculating torque?
Angular acceleration
Lever arm
Distance from the pivot point
Force applied
What physical quantity is obtained by integrating acceleration with respect to time?
Displacement
Velocity
Force
Torque