New answers tagged rotational-kinematics
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Why we can move forward in case of backward slipping?
The diagram shows a wheel rotating backwards and therefore skidding along the ground as it moves forwards. Because the wheel is skidding there is a frictional force equal to the friction coefficient ...
- 331k
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Angular Acceleration of Spinning Body About a Rotating Axis
Let's first start with a picture. The object (blue ball) is rotating around the AB axis with angular velocity $\vec\omega_0$.
Next, the $AB$ axis is rotating around the vertical with an angular ...
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Serious confusion regarding central concept of torque
One thing that might give you better intuition is that the definition of an angle is the ratio of 2 lengths:
$$\theta = \frac{s}{r}$$
With $s$ being the arc length traveled along a circle, and $r$ the ...
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Serious confusion regarding central concept of torque
When you're using, for instance, $\vec{F}=m\vec{a}$, you have to specify the system you're applying it to:
$\vec{a}=\alpha r\vec{e}_\theta$ is the acceleration of a single point of the rod, not of ...
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Problems and trignometric generalities
$\vec v$ is perpendicular to the vector $\vec R$ from the center to the point where v is indicated. The vertical component of $\vec v$ is perpendicular to the horizontal line from the center to the ...
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