5.4. (a) Find the angle between the vectors ū = 7ââ+2ŷ and i = -lâêt+5ŷ by using the dot product and then check your result by converting both vectors into magnitude and direction and comparing their directions. (Yes, I'm being lazy here and not using units. This is just a math exercise.) [3.0 N] [1.0N] 1.0 m (b) If ū = and ū = what is ū· T? Show that you get the same answer |-2.0m| both by using x and y components and by using the formula u ·J = |ū||T| cos 0, where 0 is the angle between the two vectors.

5.4. (a) Find the angle between the vectors ū = 7ââ+2ŷ and i = -lâêt+5ŷ by using the dot product and then check your result by converting both vectors into magnitude and direction and comparing their directions. (Yes, I'm being lazy here and not using units. This is just a math exercise.) [3.0 N] [1.0N] 1.0 m (b) If ū = and ū = what is ū· T? Show that you get the same answer |-2.0m| both by using x and y components and by using the formula u ·J = |ū||T| cos 0, where 0 is the angle between the two vectors.