(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A rigid body is rotating with angular velocity 2 rad/s about an axis in the

direction of the vector (i + j + k) and passing through the point Q = (0, 1, -1) on

the body. Find the linear velocity of the point P = (1, 0, 1) on the body.

(You may use the result v = ω x r .)

2. Relevant equations

v= ω x r

3. The attempt at a solution

Magnitude of vector joining P and Q = |P-Q| = r

.:. r = √6

v= ω x r

v= 2 x √6

v = 4.8990m/s

I'm assuming I'm completely wrong because the amount of work isn't enough for the amount of marks. I've seen similar questions online and I've noticed that x=1+t, y=1+2t and z=3t have been used in a number of the answers. Are these general rules or have they been derived from the question somehow? Any and all help would be greatly appreciated. Thanks.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Linear velocity of rigid body with vectors

**Physics Forums | Science Articles, Homework Help, Discussion**