Like last lesson, this one will be short. I will just go over a sample problem that
involves angular acceleration.
A wheel begins from rest and attains an angular velocity of 545rpm in 1 minute. What
is the angular acceleration in rad/s2?
First, we need to convert rpm to rad/s and then use the angular acceleration formula.
545rpm * 2
÷ 60s = 57.072rad/s
a = (57.072rad/s - 0rad/s) / 60s
a = .951rad/s2
That's all there is to rotational motion. It's virtually the same as linear motion.
The reason this section has been so short is because the only differences between it an
the linear motion sections are a few of the symbols. Later on we will get into
centripetal motion, which puts a whole new twist on going in circles.
For now, though, we are going to jump into some of the earth's
fundamental forces.
Rotational Motion Sample Problems
