IB Physics Topic a - Space, Time and Motion Questionbank

A yo-yo of mass $m$ and radius $r$ is released from rest and allowed to fall vertically while unwinding. If its moment of inertia is $I=\frac{1}{2}m{r}^2$, what is the linear acceleration of its center of mass?

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A plank of mass $8.0kg$ and length $4.0m$ rests horizontally on two supports placed $0.5m$ from each end. A person of mass $60kg$ walks from the center toward one end. At what distance from the center will the plank begin to tip?

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A uniform disc of mass $m$ and radius $r$ has a moment of inertia $I=\frac{1}{2}m{r}^2$ about its central axis. The disc is spinning at angular velocity $\omega$ about that axis when it is gently placed on a rough horizontal surface, with its centre initially at rest. Friction acts until the disc rolls without slipping.

What is the angular velocity of the

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A pulley system consists of a solid disc (mass $3.0kg$, radius $0.25m$) mounted horizontally and free to rotate. A $1.5kg$ mass is suspended and allowed to fall, causing the pulley to rotate. What is the angular acceleration of the disc?

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