Rotational motion
We have just dealt with linear motion but the same principles apply to rotational motion, the equations being similar in form.
With linear motion, for a constant mass, we can express a force in terms of mass times acceleration:
For a point particle the corresponding equation for rotational motion is:
Where τ is torque, I is the moment of inertia of the particle about the axis and α is the angular acceleration.
When examining rotational motion we cannot use the mass of an object as a measure of inertia, i.e., its resistance to acceleration. The inertia of a rotating body is expressed in terms of the moment of inertia, the determination of which we shall look at later.
Projectiles
As mentioned earlier, velocity is a vector quantity, i.e.,…
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Model Engineer (Digital) - 1 Issue, Issue 4753