Solve 3D Vectors: A, V0, R0, T for r0, V, Vave

[Mimi]

3Dvectors !?

Given; A=<3,-2,-4>m/s^2 , V0=<1,2,3>m/s, R0=<30,-80,40>m, T=8s.
Find; r0, V, Vave...?

Is this 3D vector question? What formulas should I use for finding these values?? Please help...

 

[yourdadonapogostick]

what is R₀?

 

[neurocomp2003]

position...i'm assuming its find r1

 

[yourdadonapogostick]

Given; A=<3,-2,-4>m/s^2 , V0=<1,2,3>m/s, R0=<30,-80,40>m, T=8s.

duh, i should have looked at the units...maybe i should get some sleep(it is 1:26am here)


well, i'd go with \vec{R}=\vec{R_0}+\vec{v_0}t+\frac{1}{2}\vec{a}t^2 to find r. you can use \vec{v}=\vec{v_0}+\vec{a}t to find v. \vec{v}_{avg}=\frac{\vec{v}+\vec{v_0}}{2} to find out avg velocity.


edit: yes, it is a 3-d vector question

 

[Mimi]

So...should I break A, V0, and R0 into their components form (like A=2i-4j-3k) and plug them into the kinematics equations?