BRAINCAKEMoments Question 1
Question: a uniform metre rule is balanced on a pivot at its 50 cm mark. A 2.0 N weight hangs from the 10 cm mark. Where must a 5.0 N weight be hung to balance the rule?
Step 1: identify the moments. The rule is uniform, so its centre of gravity is at the 50 cm mark, directly above the pivot. Its weight has no moment about the pivot and can be ignored.
Sign in free to see the rest of this lesson, the R.E.C.I.P.E. recall steps and the quiz
BrainCake is free. Make an account in seconds and pick up where this page stops.
Key terms in this lesson
- moment
- The turning effect of a force, equal to the force multiplied by the perpendicular distance from its line of action to the pivot.
- equilibrium
- A state in which the resultant force and resultant moment on an object are both zero, so it has no tendency to accelerate or turn.
More in Motion
- The Parallelogram Rule
- Free-Body Force Diagrams
- The Moment of a Force
- Centre of Gravity
- Moments Question 2
- Newton's First Law of Motion
- Newton's Second Law of Motion
- Newton's Third Law of Motion
All 31 lessons in Motion · All Edexcel AS-level Physics topics