I'm doing a vector problem which involves two forces with an angle of 30 degrees between them acting on an object. I think that I should draw my vector diagram with the vectors coming out of the object while my friend thinks that the vectors should point into the object. Which is right or does it make a difference? Thanks.

Since a vector shows direction as well as magnitude, the arrow should point in the direction that the forces are acting.

In vector problems, it is important to establish a clear and consistent convention for representing vectors. Both approaches you mentioned can be used, but the choice depends on the specific context and convention you are following.

To determine the convention, consider the following points:

1. Standard convention: In many physics and engineering contexts, it is common to represent forces as vectors directed away from the object. This convention assumes that the object is the point of reference, and the vectors represent the external influences acting upon it. This is often referred to as the "outward convention." In this case, you would draw the vectors coming out of the object.

2. Opposite convention: In some cases, particularly in mathematical or theoretical contexts, the opposite convention is used. This convention assumes that the vectors represent the forces applied by the object on other objects or the system. These forces are then considered as acting "into" the object. This is often referred to as the "inward convention." In this case, you would draw the vectors pointing into the object.

To ensure clarity and avoid confusion, it is important to establish which convention you are using and adhere to it consistently throughout your problem-solving process. If you are unsure, consider checking the problem statement or consulting your learning materials for any specific instructions or conventions that should be followed.

Additionally, you should note that regardless of the convention used, the scalar components of the vector forces (such as their magnitudes and directions) will ultimately be the same. The only difference lies in how they are graphically represented.