Moments

Moments Quiz

Spec S1 · AQA A-Level Maths: Quiz

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1. A force of $12$ N acts perpendicular to a spanner at $0.25$ m from the nut. Find its moment about the nut.
- A. $48$ N m
- B. $3$ N m
- C. $12.25$ N m
- D. $0.02$ N m
2. Which expression gives the unit of moment in base SI units?
- A. $\text{kg m s}^{-2}$
- B. $\text{kg m s}^{-1}$
- C. $\text{kg m}^2\text{s}^{-2}$
- D. $\text{kg m}^2\text{s}^{-1}$
3. A light plank balances on a pivot. A $4$ kg mass is $0.6$ m on one side and a mass $m$ is $0.8$ m on the other. Find $m$ .
- A. $3$ kg
- B. $5.33$ kg
- C. $4$ kg
- D. $2.4$ kg
4. A uniform rod $AB$ of length $4$ m and weight $98$ N rests horizontally on supports at $A$ and at $C$ , where $AC=3$ m. Find the reaction at $C$ .
- A. $49.0$ N
- B. $98.0$ N
- C. $32.7$ N
- D. $65.3$ N
5. A uniform plank of mass $20$ kg and length $6$ m rests on supports $1$ m from each end. What is the greatest mass a person could have standing at one extreme end without the plank tilting?
- A. $20$ kg
- B. $40$ kg
- C. $60$ kg
- D. $30$ kg