Question 5
Equilibrium of ForcesThe diagram above shows a solid figure with base PQ and centre of gravity G on an inclined plane. Which of the following statements is correct?
- A.The solid will fall over if the vertical line through G lies outside the base
- B.The solid will fall over if the vertical line through G lies inside the base
- C.The solid will not fall over if the vertical line through G lies outside the base.
- D.The solid can never fall over.
Show the answer and explanation
Answer: A (The solid will fall over if the vertical line through G lies outside the base)
Explanation
A body topples when the vertical line through its centre of gravity falls outside its base, because its weight then gives a turning moment about the edge.