- #1
Gattz
- 23
- 0
Homework Statement
In a meeting of mimes, mime 1 goes through a displacement d1 = (2.79 m)i + (3.53 m)j and and mime 2 goes through a displacement d2 = (-6.75 m)i + (5.3 m)j. What are (a)|d1 × d2|, (b)d1 · d2, (c)(d1 + d2) · d2, and (d) the component of d1 along the direction of d2?
Give your answers in standard SI units.
Homework Equations
vectors a dot b = axbx + ayby + azbz
The Attempt at a Solution
I got part a and c, but not b and d.
For part b isn't it (-18.8)(1) + 0 + 0 + (18.7)(1) = -.1? I don't know what part d is asking for.