| Exam Board | OCR |
|---|---|
| Module | M4 (Mechanics 4) |
| Year | 2003 |
| Session | June |
| Marks | 4 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Circular Motion 1 |
| Type | Angular kinematics – constant angular acceleration/deceleration |
| Difficulty | Moderate -0.8 This is a straightforward application of constant angular acceleration equations (rotational analogues of SUVAT). Students simply substitute given values into standard formulae ω²=ω₀²+2αθ and ω=ω₀+αt. It requires only direct recall and basic algebraic manipulation with no problem-solving insight, making it easier than average. |
| Spec | 6.05a Angular velocity: definitions |
1 A propeller shaft has constant angular acceleration. It turns through 160 radians as its angular speed increases from $15 \mathrm { rad } \mathrm { s } ^ { - 1 }$ to $25 \mathrm { rad } \mathrm { s } ^ { - 1 }$. Find\\
(i) the angular acceleration of the propeller shaft,\\
(ii) the time taken for this increase in angular speed.
\hfill \mbox{\textit{OCR M4 2003 Q1 [4]}}