The components of vector a are: ax 6.1 ay -8.6 what is the angle measured counterclockwise from the x-axis to vector a? 215 degrees 305 degrees 55 degrees 145 degrees 125 degrees

here as it is given that x component of the vector is positive while y component of the vector is negative so we can say the vector must inclined in Fourth quadrant.

So angle must be more than 270 degree and less than 360 degree

Now in order to find the value we can say that

so it is inclined at above angle with X axis in fourth quadrant

Now if angle is to be measured counterclockwise then its magnitude will be

so the correct answer will be 305 degree

there are no contact forces mentioned on the list of choices that you've provided.