- #1

- 11

- 0

**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...

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- Thread starter Mimi
- Start date

- #1

- 11

- 0

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...

- #2

- 258

- 1

what is R_{0}?

- #3

- 1,356

- 2

position...i'm assuming its find r1

- #4

- 258

- 1

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

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

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

- #5

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