determine the displacement vector that must be added to the displacement) 25-16) m to give a displacement of 7m pointing in the positive x-direction?

Answer 1

what direction is the 25-16 vector in?

Answer 2

I'm assuming the given vector is <25,-16>

So, you want a vector pointing in the +x direction, where y=0. So,

<-18,+16> will do the trick. Adding the two gives

<7,0>

Answer 3

A feather has a mass of 0.05 kg. It falls to ground while experiencing air resistance of 0.3 N. What¡¯s the actual acceleration of the feather?

Answer 4

0.21