AP®︎ Physics 1: Topic 8.3 Practice Test

Prepare for your quiz, test, or the AP exam with focused practice questions on Topic 8.3 of AP Physics 1 – Fluids and Newton’s Laws.


Questions List

Topic 8.3

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Question 1 Easy

A rock with volume 2.0×10−3 m32.0 \times 10^{-3}\ \text{m}^3 and density 2500 kg/m32500\ \text{kg/m}^3 is held fully submerged in water. The density of water is 1000 kg/m31000\ \text{kg/m}^3. Use g=10 m/s2g = 10\ \text{m/s}^2.

The magnitude of the buoyant force exerted by the water on the rock is most nearly
A50 N50\ \text{N}
B20 N20\ \text{N}
C30 N30\ \text{N}
D2.0 N2.0\ \text{N}

What You’re Being Tested On:

Explore the learning objectives taken directly from the College Board’s AP® Physics 1 Curriculum. Ensure you’re prepared for the exact topics covered on the AP® exam, in-class tests, and quizzes, and gain confidence in your mastery of the material.

Topic 8.3: Fluids and Newton's Laws

Learning Objective: 8.3.A

Describe the conditions under which a fluid's velocity changes.

Essential Knowledge: 8.3.A.1

Newton's laws can be used to describe the motion of particles within a fluid.

Essential Knowledge: 8.3.A.2

The macroscopic behavior of a fluid is a result of the internal interactions between the fluid's constituent particles and external forces exerted on the fluid.

Learning Objective: 8.3.B

Describe the buoyant force exerted on an object interacting with a fluid.

Essential Knowledge: 8.3.B.1

The buoyant force is a net upward force exerted on an object by a fluid.

Essential Knowledge: 8.3.B.2

The buoyant force exerted on an object by a fluid is a result of the collective forces exerted on the object by the particles making up the fluid.

Essential Knowledge: 8.3.B.3

The magnitude of the buoyant force exerted on an object by a fluid is equivalent to the weight of the fluid displaced by the object. Relevant equation: Fb=ρVgF_b = \rho V g