We are open Saturday and Sunday!

Call Now to Set Up Tutoring:

(888) 888-0446

AP Physics 1 : AP Physics 1

Study concepts, example questions & explanations for AP Physics 1

Create An Account

All AP Physics 1 Resources

7 Diagnostic Tests 170 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #81 : Work, Energy, And Power

A child weighing in an 30kg is walking at $3.0\frac{m}{s}$ . What is his or her average kinetic energy?

Possible Answers:

100J

200J

135J

50J

Correct answer:

135J

Explanation:

For this question use the equation for kinetic energy.

$K_{e}=\frac{1}{2}m(v^{2})$

Plug in and solve for the the kinetic energy.

$K_{e}=\frac{1}{2}(30Kg)3.0\frac{m}{s}$

$K_{e}=135j$

The child will have a kinetic energy equal to 135j .

Report an Error

Example Question #33 : Kinetic Energy

A box of mass 50kg is initially at rest, and is then subject to 200N of a directing horizontal pulling force. Neglecting friction and air resistance, what is the kinetic energy of the box after 5 s ?

Possible Answers:

10kJ

5kJ

1kJ

100kJ

Correct answer:

10kJ

Explanation:

First, solve for the acceleration of the box using Newton's second law.

f=ma

Plug in and solve for the acceleration.

200N=50kg(a)

$a=4\frac{m}{s^{2}}$

Now use a kinematic equation to solve for the final velocity.

$v_{f}=v_{o}+a\Delta t$

Plug in and solve for the final velocity.

$v_{f}=0\frac{m}{s}+4\frac{m}{s^{2}}(5s)$ $v_{f}=20\frac{m}{s}$

Finally, we will use the kinetic energy equation to determine the kinetic energy of the box after 5 seconds .

$K_{e}=\frac{1}{2}m(v^{2})$

Plug in and solve for the kinetic energy.

$K_{e}=\frac{1}{2}50Kg(20\frac{m}{s})^{2}$

$K_{e}=10,000j$

The final kinetic energy of the box will be 10Kj .

Report an Error

Example Question #34 : Kinetic Energy

Two space ships are racing deep in space. At t=0 , Spaceship A is at the origin while traveling at $<600,400> \frac{m}{s}$ . It is coasting, with it’s rockets off. Spaceship B is at <-600,-400>m . It’s traveling at $<150,100>\frac{m}{s}$ . It’s rockets are firing with a constant force of <1.5*10^6N, 1*10^6N> . Both rockets have a mass of 1.5*10^5 kg .

What is the total kinetic energy of the two spaceships at t=0 ?

Possible Answers:

$KE_{total}=3.95*10^{10}J$

None of these

$KE_{total}=8.44*10^{10}J$

$KE_{total}=6.05*10^{10}J$

$KE_{total}=4.15*10^{10}J$

Correct answer:

$KE_{total}=4.15*10^{10}J$

Explanation:

Finding net velocity of Spaceship :

$v_{net}=\sqrt{v_x^2+v_y^2}$

$v_{net}=\sqrt{600^2+400^2}$

$v_{net}=721\frac{m}{s}$

Finding net velocity of Spaceship :

$v_{net}=\sqrt{v_x^2+v_y^2}$

$v_{net}=\sqrt{150^2+100^2}$

$v_{net}=180\frac{m}{s}$

$KE_{total}=KE_1+KE_2$

$KE_{total}=.5m_Av_A^2+.5m_Bv_B^2$

$KE_{total}=.5*1.5*10^5*721^2+.5*1.5*10^5*180^2$

$KE_{total}=4.15*10^{10}Joules$

Report an Error

Example Question #35 : Kinetic Energy

Moment of inertia of disk: .5MR^2

A car with wheels of mass 25kg and wheels of radius .25m is traveling at $50\frac{m}{s}$ . Treating the wheels as disks of uniform mass density, calculate the rotational kinetic energy of one wheel.

Possible Answers:

$KE_{rot}=150J$

$KE_{rot}=15625J$

None of these

$KE_{rot}=35789J$

$KE_{rot}=1338J$

Correct answer:

$KE_{rot}=15625J$

Explanation:

Finding angular velocity:

$50\frac{m}{s}*\frac{1 rotation}{2*\pi*.25m}*\frac{2\pi radians}{rotation}=200\frac{radians}{second}$

Using

I=.5MR^2

and

$KE_{rot}=.5I\omega^2$

Combining equations and plugging in values:

$KE_{rot}=.5*.5*25*.25^2*200^2$

$KE_{rot}=15625Joules$

Report an Error

Example Question #82 : Work, Energy, And Power

A soccer ball at rest of mass 4kg is accelerated at $3\frac{m}{s}^2$ for . What is the final kinetic energy in Joules of the ball after ?

Possible Answers:

KE=1600J

KE=1550J

None of these

KE=1322J

KE=1458J

Correct answer:

KE=1458J

Explanation:

First find the final speed of the ball using $V=V_{0}+at$ . Then, use KE=.5mv^2 to find the kinetic energy after 9s.

$V=(3\frac{m}{s^2})(9s)=27\frac{m}{s}$

$KE=.5(4kg)(27\frac{m}{s})^2=\boldsymbol{1458J}$

Report an Error

Example Question #37 : Kinetic Energy

A 1200 kg missile has a net propulsion force of 60 kN . Over a brief period, the missile speeds up uniformly from an initial velocity $30\frac{m}{s}$ to $40\frac{m}{s}$ . Assume that the missile will not lose mass during fuel consumption and so the net propulsion remains constant. What is the net work done on the rocket in kilojoules?

Possible Answers:

420kJ

333kJ

300kJ

275kJ

268kJ

Correct answer:

420kJ

Explanation:

Find the KE of the missile at each velocity. The difference or change in KE is the net work done on the missile.

KE=.5(1200kg)30^2=540,000J

KE=.5(1200kg)40^2=960,000J

$\DeltaKE=960,000-540,000=420,000J$

Divide by 1000 to convert to . 420kJ

Report an Error

Example Question #81 : Work, Energy, And Power

A bullet with mass .05 kg hits the bullseye at $300\frac{m}{s}$ . Assuming no loss of energy due to heat or frictional forces, how much energy in Joules did the bullet transfer to the target?

Possible Answers:

2250J

2900J

2400J

2150J

2500J

Correct answer:

2250J

Explanation:

Find the kinetic energy:

$KE=.5mv^2\rightarrow .5(0.05kg)(300\frac{m}{s})^2=\boldsymbol{2250J}$

Report an Error

Example Question #39 : Kinetic Energy

A sledder of mass m = 60kg is traveling down a hill with slope of $40^{\circ}$ above the horizontal. If the sledder starts from rest and has an average frictional force of 150N , what is the velocity of the sledder after traveling 70m along the slope?

$g=10\frac{m}{s^2}$

Possible Answers:

$23.5 \frac{m}{s}$

$15.6\frac{m}{s}$

$31.2\frac{m}{s}$

$26.0\frac{m}{s}$

$19.7\frac{m}{s}$

Correct answer:

$23.5 \frac{m}{s}$

Explanation:

We can begin with the expression for conservation of energy for this problem:

E=U_i+K_i+W=U_f+K_f

We are told that the sledder begins from rest, so we can eliminate initial kinetic energy. Also, if we say that the final height of the sledder is 0, we can eliminate final potential energy. Also, the only work being done is from friction, and the work is being removed from the system, so it will be negative. Therefore, we get:

U_i+W_F=K_f

Substituting in expressions for each of these, we get:

$mgh_i-F_Fd=\frac{1}{2}mv_f^2$

Rearranging for final velocity:

$v_f = \sqrt{\frac{2(mgh_i-F_Fd)}{m}}$

Now we just need an expression for initial height:

$h_i = sin(\theta)d$

Plugging this in, we get:

$v_f = \sqrt{\frac{2(mgsin(\theta)d-F_Fd)}{m}}$

We have all of these values, so time to plug and chug:

$v_f = 23.5\frac{m}{s}$

Report an Error

Example Question #40 : Kinetic Energy

Rollercoaster 2

The following train car has just went around the loop of this roller coaster and is now travelling to the left. The train car weighs $545\ kg$ and is travelling at a speed of $52.0\ \frac{m}{s}$ .

What is the approximate kinetic energy of the train car?

Possible Answers:

$524\ kJ$

$596\ kJ$

$737\ kJ$

$912\ kJ$

$651\ kJ$

Correct answer:

$737\ kJ$

Explanation:

Kinetic energy is defined by the following equation:

$KE=\frac{1}{2}mv^{2}$

where is mass, and is velocity.

In this question, you are given the mass and velocity, so by plugging in the given values it is possible to find the kinetic energy (in Joules).

$KE=\frac{1}{2}(545)(52.0^{2})$

$KE\approx 737\ kJ$

Report an Error

Example Question #91 : Work, Energy, And Power

Moment of inertia of a ring: I=m*r^2

A bicycle wheel has a mass of 2.8kg and a radius of 622mm . Determine the total kinetic energy of the wheel if the bicycle is moving at $10\frac{m}{s}$ . The wheel may be approximated as a hollow ring.

Possible Answers:

None of these

635J

140J

2.8J

280J

Correct answer:

280J

Explanation:

$KE_{total}=KE_{trans}+KE_{rot}$

$KE_{total}=.5mv^2+.5I\omega^2$

I=m*r^2

$\omega=\frac{v}{r}$

Combining equations

$KE_{total}=.5mv^2+.5*m*v^2$

Plugging in values:

$KE_{total}=2.8*10^2$

$KE_{total}=280J$

Report an Error

View AP Physics 1 Tutors

Vikash
Certified Tutor

national institute of technology Jamshedpur , Bachelor, Civil engineering .

View AP Physics 1 Tutors

Rohan
Certified Tutor

Purdue University-Main Campus, Bachelor of Engineering, Aerospace Engineering.

View AP Physics 1 Tutors

Dilip
Certified Tutor

University of Calcutta, Bachelor of Science, Physics. Indiana Institute of Technology, Master of Science, Physics.

All AP Physics 1 Resources

7 Diagnostic Tests 170 Practice Tests Question of the Day Flashcards Learn by Concept

Popular Subjects

Calculus Tutors in San Diego, English Tutors in Denver, Spanish Tutors in Denver, French Tutors in Miami, MCAT Tutors in Dallas Fort Worth, SAT Tutors in Philadelphia, ISEE Tutors in Atlanta, ISEE Tutors in Boston, LSAT Tutors in Boston, LSAT Tutors in San Diego

Popular Courses & Classes

GRE Courses & Classes in Philadelphia, ISEE Courses & Classes in New York City, GMAT Courses & Classes in New York City, Spanish Courses & Classes in San Francisco-Bay Area, GMAT Courses & Classes in Philadelphia, GRE Courses & Classes in Atlanta, GRE Courses & Classes in Washington DC, ACT Courses & Classes in Philadelphia, SSAT Courses & Classes in Chicago, MCAT Courses & Classes in Atlanta

Popular Test Prep

ACT Test Prep in Philadelphia, ISEE Test Prep in Washington DC, SAT Test Prep in San Francisco-Bay Area, SAT Test Prep in Denver, GRE Test Prep in Philadelphia, MCAT Test Prep in San Diego, MCAT Test Prep in Atlanta, MCAT Test Prep in Houston, GMAT Test Prep in New York City, MCAT Test Prep in Philadelphia

DMCA Complaint

If you believe that content available by means of the Website (as defined in our Terms of Service) infringes one or more of your copyrights, please notify us by providing a written notice (“Infringement Notice”) containing the information described below to the designated agent listed below. If Varsity Tutors takes action in response to an Infringement Notice, it will make a good faith attempt to contact the party that made such content available by means of the most recent email address, if any, provided by such party to Varsity Tutors.

Your Infringement Notice may be forwarded to the party that made the content available or to third parties such as ChillingEffects.org.

Please be advised that you will be liable for damages (including costs and attorneys’ fees) if you materially misrepresent that a product or activity is infringing your copyrights. Thus, if you are not sure content located on or linked-to by the Website infringes your copyright, you should consider first contacting an attorney.

Please follow these steps to file a notice:

You must include the following:

A physical or electronic signature of the copyright owner or a person authorized to act on their behalf; An identification of the copyright claimed to have been infringed; A description of the nature and exact location of the content that you claim to infringe your copyright, in \ sufficient detail to permit Varsity Tutors to find and positively identify that content; for example we require a link to the specific question (not just the name of the question) that contains the content and a description of which specific portion of the question – an image, a link, the text, etc – your complaint refers to; Your name, address, telephone number and email address; and A statement by you: (a) that you believe in good faith that the use of the content that you claim to infringe your copyright is not authorized by law, or by the copyright owner or such owner’s agent; (b) that all of the information contained in your Infringement Notice is accurate, and (c) under penalty of perjury, that you are either the copyright owner or a person authorized to act on their behalf.

Send your complaint to our designated agent at:

Charles Cohn Varsity Tutors LLC
101 S. Hanley Rd, Suite 300
St. Louis, MO 63105

Or fill out the form below:

Do not fill in this field

Contact Information

* Full legal name

Company name

* Phone number

* Email address

Address

* Address1

Address2

* City

* State

* Zipcode

* Country

Complaint Details

* URL of copyrighted work (where your original material is located)

* Please describe the copyrighted work so that it may be easily identified

I am the owner, or an agent authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.

I have a good faith belief that the use of the material in the manner complained of is not authorized by the copyright owner, its agent, or the law.

This notification is accurate.

I acknowledge that there may be adverse legal consequences for making false or bad faith allegations of copyright infringement by using this process.

* Signature (your digital signature is legally binding)

HIGH SCHOOL

GRADUATE SCHOOL

K-8

Search 50+ Tests

math tutoring

science tutoring

foreign languages

elementary tutoring

other

Search 350+ Subjects

AP Physics 1 : AP Physics 1

Study concepts, example questions & explanations for AP Physics 1

All AP Physics 1 Resources

Example Questions

Example Question #81 : Work, Energy, And Power

Example Question #33 : Kinetic Energy

Example Question #34 : Kinetic Energy

Example Question #35 : Kinetic Energy

Example Question #82 : Work, Energy, And Power

Example Question #37 : Kinetic Energy

Example Question #81 : Work, Energy, And Power

Example Question #39 : Kinetic Energy

Example Question #40 : Kinetic Energy

Example Question #91 : Work, Energy, And Power

All AP Physics 1 Resources

Report an issue with this question

DMCA Complaint

Contact Information

Address

Complaint Details

Email address:
Your name:
Feedback: