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A mechanics question about work and vectors 
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#1
Nov1312, 11:35 AM

P: 3

this year i started studying physics, so this question might be easy but i couldn't do it... i'll be happy if you help me.
''A constant force (5N)i7(N)j is applied on an object and it moves. The total displacement of the object is l=(3)i+(6)j+(3)k. Find the angle between the force and the displacement.'' 


#2
Nov1312, 11:52 AM

PF Gold
P: 1,053

What specifically do you need help (or are having trouble) with? Please elaborate.



#3
Nov1312, 12:09 PM

P: 3

I don't know how to find the angle. How can I use the displacement information to find the angle?



#4
Nov1312, 01:19 PM

Sci Advisor
HW Helper
Thanks
PF Gold
P: 5,231

A mechanics question about work and vectors
How is the dot product of two vectors related to the angle between them?



#5
Nov1412, 02:39 AM

P: 3

Ah yes! Thank you very much. ^^



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