CIE iGCSE Co-Ordinated Science P1.5.2 Turning effect of forces Exam Style Questions Paper 1
▶️ Answer/Explanation
The moment = force × perpendicular distance from the pivot. The weight acts at the centre of gravity, 0.80 m from the left end.
The pivot is at 0.40 m from the left end. Distance from pivot = \(0.80 – 0.40 = 0.40\) m. Moment = \(50 \times 0.40 = 20\) Nm.
✅ Answer: (A)
The pivot is at 0.40 m from the left end. Distance from pivot = \(0.80 – 0.40 = 0.40\) m. Moment = \(50 \times 0.40 = 20\) Nm.
✅ Answer: (A)
▶️ Answer/Explanation
The moment of a force is calculated using \( \text{moment} = \text{force} \times \text{perpendicular distance from the pivot} \).
Substituting the values given: \( \text{moment} = 240 \times 1.6 = 384 \) N m.
The correct unit for a moment is newton-metres (N m), not N/m, so the answer is 384 N m.
✅ Answer: (C)
Substituting the values given: \( \text{moment} = 240 \times 1.6 = 384 \) N m.
The correct unit for a moment is newton-metres (N m), not N/m, so the answer is 384 N m.
✅ Answer: (C)
▶️ Answer/Explanation
The moment of a force is calculated using \( \text{moment} = \text{force} \times \text{perpendicular distance from the pivot} \).
The perpendicular distance from the pivot to the line of action of the horizontal force is the vertical side of the triangle, 40 cm.
So moment \( = 5.0 \times 40 = 200 \) N cm.
✅ Answer: (B)
The perpendicular distance from the pivot to the line of action of the horizontal force is the vertical side of the triangle, 40 cm.
So moment \( = 5.0 \times 40 = 200 \) N cm.
✅ Answer: (B)
▶️ Answer/Explanation
The moment of a force about a pivot is calculated using \(\text{moment} = \text{force} \times \text{perpendicular distance from the pivot}\).
\(\text{Moment} = 15\ \text{N} \times 0.22\ \text{m} = 3.3\ \text{N m}\).
✅ Answer: (C)
\(\text{Moment} = 15\ \text{N} \times 0.22\ \text{m} = 3.3\ \text{N m}\).
✅ Answer: (C)
▶️ Answer/Explanation
The moment of a force is calculated using \( \text{moment} = \text{force} \times \text{perpendicular distance from the pivot} \).
Force is measured in newtons (N) and distance is measured in metres (m), so the unit of moment is the product of these, N m.
N/kg is the unit for gravitational field strength, and N kg and N/m do not correspond to any standard physical quantity here.
✅ Answer: (C)
Force is measured in newtons (N) and distance is measured in metres (m), so the unit of moment is the product of these, N m.
N/kg is the unit for gravitational field strength, and N kg and N/m do not correspond to any standard physical quantity here.
✅ Answer: (C)