Exam 2: Angular Kinetics UPDATED
ACTUAL Exam Questions and CORRECT
Answers
what is newton's 1st law of angular forms? - CORRECT ANSWER - rigid bodies tend to
remain at rest or in uniform motion unless acted upon by an unbalanced moment
what is newton's 2nd law of angular forms? - CORRECT ANSWER - angular acceleration
of a body is proportional to the net moment applied
what is the equation for newton's second law of angular forms? - CORRECT ANSWER -
M=I*a
I = moment of inertia
a ("alpha") = angular acceleration
what is newton's 3rd law of angular forms? - CORRECT ANSWER - bodies in contact
exert equal and opposite moments upon one another
_________ is to linear acceleration as ___________ is to angular acceleration - CORRECT
ANSWER - forces; moment
___________ is to resistance to linear motion as _________ is resistance to angular motion -
CORRECT ANSWER - mass; moment of inertia
true or false: a body with a lot of linear momentum (mv) is hard to stop from translating -
CORRECT ANSWER - true
true or false: a body with a lot of angular momentum is easy to stop from rotating - CORRECT
ANSWER - false: a body with a lot of angular momentum is HARD to stop from rotating
, what are the units for angular momentum? - CORRECT ANSWER - kg m^2 / s
___________ applied to a body equates to its change in momentum - CORRECT
ANSWER - linear impulse
__________ applied to a body is equal to the change in its angular momentum - CORRECT
ANSWER - angular impulse
Moment could be applied to change:
A. angular velocity
B. moment of inertia
C. both A and B - CORRECT ANSWER - C. both A and B
true or false: a body with no net moment can speed up or slow down - CORRECT
ANSWER - true: mass wont change but moment of inertia can change
when is angular momentum conserved? - CORRECT ANSWER - if the applied moment to
the body is zero
true or false: changing moment of inertia will change angular velocity - CORRECT
ANSWER - true
if moment of inertia increases, angular velocity __________ - CORRECT ANSWER -
decreases
if moment of inertia decreases, angular velocity _________ - CORRECT ANSWER -
increases
ACTUAL Exam Questions and CORRECT
Answers
what is newton's 1st law of angular forms? - CORRECT ANSWER - rigid bodies tend to
remain at rest or in uniform motion unless acted upon by an unbalanced moment
what is newton's 2nd law of angular forms? - CORRECT ANSWER - angular acceleration
of a body is proportional to the net moment applied
what is the equation for newton's second law of angular forms? - CORRECT ANSWER -
M=I*a
I = moment of inertia
a ("alpha") = angular acceleration
what is newton's 3rd law of angular forms? - CORRECT ANSWER - bodies in contact
exert equal and opposite moments upon one another
_________ is to linear acceleration as ___________ is to angular acceleration - CORRECT
ANSWER - forces; moment
___________ is to resistance to linear motion as _________ is resistance to angular motion -
CORRECT ANSWER - mass; moment of inertia
true or false: a body with a lot of linear momentum (mv) is hard to stop from translating -
CORRECT ANSWER - true
true or false: a body with a lot of angular momentum is easy to stop from rotating - CORRECT
ANSWER - false: a body with a lot of angular momentum is HARD to stop from rotating
, what are the units for angular momentum? - CORRECT ANSWER - kg m^2 / s
___________ applied to a body equates to its change in momentum - CORRECT
ANSWER - linear impulse
__________ applied to a body is equal to the change in its angular momentum - CORRECT
ANSWER - angular impulse
Moment could be applied to change:
A. angular velocity
B. moment of inertia
C. both A and B - CORRECT ANSWER - C. both A and B
true or false: a body with no net moment can speed up or slow down - CORRECT
ANSWER - true: mass wont change but moment of inertia can change
when is angular momentum conserved? - CORRECT ANSWER - if the applied moment to
the body is zero
true or false: changing moment of inertia will change angular velocity - CORRECT
ANSWER - true
if moment of inertia increases, angular velocity __________ - CORRECT ANSWER -
decreases
if moment of inertia decreases, angular velocity _________ - CORRECT ANSWER -
increases
