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AP®︎ Physics 1: Topic 6.3 Practice Test

Prepare for your quiz, test, or the AP exam with focused practice questions on Topic 6.3 of AP Physics 1 – Angular Momentum and Angular Impulse.

Questions List

Topic 6.3

Q10

Q11

Q12

Q13

Q14

Q15

Q16

Question 1 Easy

A ceiling fan's blade assembly has a rotational inertia of

0.60\ \mathrm{kg\cdot m^2}

about its axle and rotates at an angular speed of

20\ \mathrm{rad/s}

. The magnitude of its angular momentum about the axle is most nearly

0.030\ \mathrm{kg\cdot m^2/s}

240\ \mathrm{kg\cdot m^2/s}

12\ \mathrm{kg\cdot m^2/s}

120\ \mathrm{kg\cdot m^2/s}

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 6.3: Angular Momentum and Angular Impulse

Boundary Statements official exam scope notes

While AP Physics 1 expects that students can mathematically manipulate the magnitude of angular momentum using one-dimensional vector conventions, the direction of angular momentum and angular impulse is beyond the scope of the course.

Learning Objective: 6.3.A

Describe the angular momentum of an object or rigid system.

Essential Knowledge: 6.3.A.1

The magnitude of the angular momentum of a rigid system about a specific axis can be described with the equation $L = I\omega$ .

Essential Knowledge: 6.3.A.2

The magnitude of the angular momentum of an object about a given point is $L = rmv \sin \theta$ .

Essential Knowledge: 6.3.A.2.i

The selection of the axis about which an object is considered to rotate influences the determination of the angular momentum of that object.

Essential Knowledge: 6.3.A.2.ii

The measured angular momentum of an object traveling in a straight line depends on the distance between the reference point and the object, the mass of the object, the speed of the object, and the angle between the radial distance and the velocity of the object.

Learning Objective: 6.3.B

Describe the angular impulse delivered to an object or rigid system by a torque.

Essential Knowledge: 6.3.B.1

Angular impulse is defined as the product of the torque exerted on an object or rigid system and the time interval during which the torque is exerted. Relevant equation: $\text{angular impulse} = \tau\Delta t$

Essential Knowledge: 6.3.B.2

Angular impulse has the same direction as the torque exerted on the object or system.

Essential Knowledge: 6.3.B.3

The angular impulse delivered to an object or rigid system by a torque can be found from the area under the curve of a graph of the torque as a function of time.

Learning Objective: 6.3.C

Relate the change in angular momentum of an object or rigid system to the angular impulse given to that object or rigid system.

Essential Knowledge: 6.3.C.1

The magnitude of the change in angular momentum can be described by comparing the magnitudes of the final and initial angular momenta of the object or rigid system: $\Delta L = L - L_0$

Essential Knowledge: 6.3.C.2

A rotational form of the impulse–momentum theorem relates the angular impulse delivered to an object or rigid system and the change in angular momentum of that object or rigid system.

Essential Knowledge: 6.3.C.2.i

The angular impulse exerted on an object or rigid system is equal to the change in angular momentum of that object or rigid system. Relevant equation: $\Delta L = \tau\Delta t$

Essential Knowledge: 6.3.C.2.ii

The rotational form of the impulse–momentum theorem is a direct result of the rotational form of Newton’s second law of motion for cases in which rotational inertia is constant: $\tau_{\mathrm{net}} = \frac{\Delta L}{\Delta t} = I\frac{\Delta\omega}{\Delta t} = I\alpha$

Essential Knowledge: 6.3.C.3

The net torque exerted on an object is equal to the slope of the graph of the angular momentum of an object as a function of time.

Essential Knowledge: 6.3.C.4

The angular impulse delivered to an object is equal to the area under the curve of a graph of the net external torque exerted on an object as a function of time.

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AP®︎ Physics 1: Topic 6.3 Practice Test

Question 1 Easy

What You’re Being Tested On:

Learning Objective 6.3.A: 6.3.A.1, 6.3.A.2, 6.3.A.2.i, 6.3.A.2.ii

Learning Objective 6.3.B: 6.3.B.1, 6.3.B.2, 6.3.B.3

Learning Objective 6.3.C: 6.3.C.1, 6.3.C.2, 6.3.C.2.i, 6.3.C.2.ii, 6.3.C.3, 6.3.C.4