Asked by Anonymous
I have a select-multiple question, and I am not sure about everything and I only get one try in my online class...would really appreciate if you could please explain which to select:
What is true about momentum value?
a)When you muliply mass (a scalar) by velocity (a vector), the result is momentum (a vector) -- I selected this one
b)You must multiply two vectors in order to result in a vector -- didn't do this one, because you can multiply scalar by vector
c)The direction of the momentum vector is the same as the velocity vector -- selected this one, confirmed with Google
d)The magnitude of the momentum vector is dependent on the mass -- didn't select this one, because I thought it also depends on velocity
e)The direction of the momentum vector is dependent on the mass -- didn't select this, because mass is scalar
Where am I going wrong with what to select? I just want a second opinion before I use my only attempt...thanks!
What is true about momentum value?
a)When you muliply mass (a scalar) by velocity (a vector), the result is momentum (a vector) -- I selected this one
b)You must multiply two vectors in order to result in a vector -- didn't do this one, because you can multiply scalar by vector
c)The direction of the momentum vector is the same as the velocity vector -- selected this one, confirmed with Google
d)The magnitude of the momentum vector is dependent on the mass -- didn't select this one, because I thought it also depends on velocity
e)The direction of the momentum vector is dependent on the mass -- didn't select this, because mass is scalar
Where am I going wrong with what to select? I just want a second opinion before I use my only attempt...thanks!
Answers
Answered by
Henry
I agree with all of your selections.
Answered by
Damon
d) is poorly worded. Of course the magnitude depends on the mass --- but also on the absolute value of the velocity vector
|P| = m |V|
so it does not depend ONLY on the mass but does depend on the mass.
|P| = m |V|
so it does not depend ONLY on the mass but does depend on the mass.
Answered by
Anonymous
Thanks! The answer was all my original selections plus choice d). :)
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