The diagram shows two fixed pins, Y and Z . A length of elastic is stretched between Y and Z and around pin $$\(X\)$$, which is attached to a trolley.
A.
B.
C.
D.
Exam No：9702_s25_qp_14 Year：2025 Question No：4
Answer:
C
Knowledge points:
1.4.1 distinguish between scalar and vector quantities and give examples of each
1.4.2 add and subtract coplanar vectors
1.4.3 represent a vector as two perpendicular components
5.3.1 state and apply the principle of moments
5.3.2 understand that, when there is no resultant force and no resultant torque, a system is in equilibrium
5.3.3 use a vector triangle to represent coplanar forces in equilibrium
Solution:
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