Moments and equilibrium of rigid bodies

Moments and equilibrium of rigid bodies Quiz

Spec 9.1 · Edexcel A-Level Maths: Quiz

Studying this course? Keep your progress in one place.

Pick an answer for each. Quizzes never use energy.

5 questions, one answer each

Each answer is checked as you go, with why.

See all 5 questions

1. A force of 20 N acts perpendicular to a spanner at 0.3 m from the nut. Find the moment about the nut.
- A. $60$ N m
- B. $0.015$ N m
- C. $6$ N m
- D. $20.3$ N m
2. A uniform beam of mass 10 kg and length 4 m rests on supports at its two ends. Find the reaction at each end.
- A. $98$ N
- B. $49$ N
- C. $24.5$ N
- D. $196$ N
3. A 30 N force acts at the end of a 2 m rod at $60^\circ$ to the rod. Find its moment about the other end.
- A. $30$ N m
- B. $60$ N m
- C. $26.0$ N m
- D. $52.0$ N m
4. Which forces act on a ladder resting on rough ground against a smooth wall?
- A. Weight, wall reaction, ground reaction and friction at the ground
- B. Weight, wall reaction and ground reaction only
- C. Weight, friction at the wall and ground reaction
- D. Weight and friction at the ground only
5. A uniform plank balances on a pivot. A child of 30 kg sits 2 m from the pivot. Where must a 40 kg child sit on the other side?
- A. $1.0$ m
- B. $1.5$ m
- C. $2.5$ m
- D. $0.75$ m