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1
2
1
2
1
2
1
2
1
2
1
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75 cm
25 cm
11 kg
±
±
±
8&/(6 21
surface of sea
box on the
surface of the sea
surface of sea
box sinking
upthrust
depth 0
upthrust
depth
upthrust
depth
upthrust
depth
before after
mass
spring
8&/(6 21
area A area
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ropes
object
±
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±
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vessel P vessel Q
© UCLES 2022 9702/22/O/N/22 [Turn over
(iii) The hinge exerts a force on the beam at end A.
Calculate the horizontal component of this force.
horizontal component of force = ..................................................... N [1]
(iv) The block is now placed closer to point D on the beam.
State whether this change will increase, decrease or have no effect on the tension in the
wire.
(v) The stress in the wire is 5.3 ) 10
7
Pa. The wire is now replaced by a second wire that has
a radius which is three times greater than that of the original wire. The tension in the wire
is unchanged.
Calculate the stress in the second wire.
stress = .................................................... Pa [2]
[Total: 9]