| Exam Board | OCR |
|---|---|
| Module | M1 (Mechanics 1) |
| Year | 2010 |
| Session | June |
| Marks | 8 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Constant acceleration (SUVAT) |
| Type | Find acceleration from distances/times |
| Difficulty | Moderate -0.8 This is a straightforward three-part SUVAT question requiring direct application of standard kinematic equations and Newton's second law. Part (i) uses v=u+at, part (ii) uses v²=u²+2as, and part (iii) applies F=ma with friction force μR=μmg. All parts are routine calculations with no problem-solving insight required, making it easier than average but not trivial since it requires correct setup of multiple equations. |
| Spec | 3.02d Constant acceleration: SUVAT formulae3.03r Friction: concept and vector form3.03t Coefficient of friction: F <= mu*R model |
1 A block $B$ of mass 3 kg moves with deceleration $1.2 \mathrm {~m} \mathrm {~s} ^ { - 2 }$ in a straight line on a rough horizontal surface. The initial speed of $B$ is $5 \mathrm {~m} \mathrm {~s} ^ { - 1 }$. Calculate\\
(i) the time for which $B$ is in motion,\\
(ii) the distance travelled by $B$ before it comes to rest,\\
(iii) the coefficient of friction between $B$ and the surface.
\hfill \mbox{\textit{OCR M1 2010 Q1 [8]}}