# AP Physics B

Part 1 An 11.6 kg block of metal is suspended from a
scale and immersed in water as in the ﬁgure.
The dimensions of the block are 12.9 cm ×
9.7 cm × 9.7 cm. The 12.9 cm dimension is
vertical, and the top of the block is 5.07 cm
below the surface of the water.
b
T2
Mg
B
What is the force exerted by the water on the top of the block? (Take P0 =
1.013 × 10
5
Pa .) The acceleration of gravity
is 9.8 m/s
2
.

Part 2
What is the force exerted by the water on the
bottom of the block?

Part 3
What is the reading of the spring scale?

Part 4
What is the buoyant force?

1. The force at any point is pressure*area

pressure=heightwater*densitywater*g

posted by bobpursley

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