Let's Tute
Why Flames Always Point Upwards (Except in Space)
This video explains why flames always point upwards on Earth due to gravity and the properties of hot air. It also shows how flames behave differently in microgravity environments like the International Space Station.
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2016 #5 Free Response Question - AP Physics 1 - Exam Solution
My solutions to Free Response Question #5 from the 2016 AP Physics 1 Exam. This is a standing waves question which requires you to determine the relationship between tension and wave speed. Also included are my reflections on how to get...
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#8 Mechanics Multiple Choice Solutions - AP Physics C 1998 Released Exam
This problem is about the acceleration of a ball at the top of its path when thrown up on the surface of a small asteroid.
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#7 Mechanics Multiple Choice Solutions - AP Physics C 1998 Released Exam
This problem is about how the gravitational force on a ball changes as it moves up away from a small asteroid.
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#30 Mechanics Multiple Choice Solutions - AP Physics C 1998 Released Exam
This problem is about the equation for the net torque on an cylinder with two radii in static equilibrium.
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#28 Mechanics Multiple Choice Solutions - AP Physics C 1998 Released Exam
This problem is about how the work done by gravity changes when an object slides up instead of down an incline.
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#22 Mechanics Multiple Choice Solutions - AP Physics C 1998 Released Exam
This problem is about finding the coefficient of kinetic friction for a block being pulled at an angle relative to a level surface.
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#20 Mechanics Multiple Choice Solutions - AP Physics C 1998 Released Exam
This problem is about using Newton's 2nd Law to determine the velocity of two identical stars in a fixed orbit around their mutual center of mass.
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#2 Mechanics Multiple Choice Solutions - AP Physics C 1998 Released Exam
This problem is about Velocity and Acceleration in Projectile Motion.
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#19 Mechanics Multiple Choice Solutions - AP Physics C 1998 Released Exam
This problem is about using Newton's 2nd Law and uniformly accelerated motion equations to determine the initial velocity of a falling elevator that is held by a cable.
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#10 Mechanics Multiple Choice Solutions - AP Physics C 1998 Released Exam
This problem is about how the period of a pendulum changes when taken to a different planet.
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2015 #1 Free Response Question - AP Physics 1 - Exam Solution
This Short Answer question also works as a part of the AP Physics C: Mechanics curriculum.
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2015 #4 Free Response Question - AP Physics 1 - Exam Solution
This Paragraph Argument Short Answer question also works as a part of the AP Physics C: Mechanics curriculum.
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2016 #1 Free Response Question - AP Physics 1 - Exam Solution
My solutions to Free Response Question #1 from the 2016 AP Physics 1 Exam. Also included are my reflections on how to get more points on the exam. This Short Answer question also works as a part of the AP Physics C: Mechanics curriculum.
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2017 #2 Free Response Question - AP Physics 1 - Exam Solution
My solutions to Free Response Question #2 from the 2017 AP Physics 1 Exam. Also included are my reflections on how to get more points on the exam. This Experimental Design question also works as a part of the AP Physics C: Mechanics...
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2018 #1 Free Response Question - AP Physics 1 - Exam Solution
My solutions to Free Response Question #1 from the 2018 AP Physics 1 Exam. Also included are my reflections on how to get more points on the exam. This Short Answer question also works as a part of the AP Physics C: Mechanics curriculum.
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2019 #2 Free Response Question - AP Physics 1 - Exam Solution
My solutions to Free Response Question #2 from the 2019 AP Physics 1 Exam. This is a dynamics question about forces and acceleration. Also included are my reflections on how to get perform better on the exam. This...
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Mechanics #3 Free Response Question Solutions - AP Physics C 1998 Released Exam
This Free Response Question includes the following concepts: Free Body Diagrams (or Force Diagrams), Static and Kinetic Friction, Tension, Force Normal, Force of Gravity, Newton's Second Law (many times), a Multiple Bock System and a...
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AP Physics C: Universal Gravitation Review (Mechanics)
Calculus based review of Universal Gravitation including Newton’s Universal Law of Gravitation, solving for the acceleration due to gravity in a constant gravitational field, universal gravitational potential energy, graphing universal...
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Conservative Force and Potential Energy
The equation which relates a conservative force to potential energy is derived. Examples are shown which prove the equation to be correct. An example is worked through and a gravitational comparison is made. Want Lecture Notes?...
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Work due to Friction equals Change in Mechanical Energy Problem by Billy
Enjoy learning from Billy as he solves a problem using Work due to Friction equals Change in Mechanical Energy.
Science ABC
Gravitational Lensing: What It Is And How It Is Helping Us Discover New Galaxies
Gravitational lensing occurs when a huge amount of matter, like a star, galaxy, or cluster of galaxies, creates a powerful gravitational field around it, strong enough to bend the light coming from distant galaxies (behind them). Roots...
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AP Physics C: Equations to Memorize (Mechanics)
Calculus based review of equations I suggest you memorize for the AP Physics C: Mechanics Exam. Please realize I abhor memorization, however, there are a few equations which I do recommend you memorize. I also list equations NOT to...
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Force vs. Time on a Dynamics Cart
When the forces in a free body diagram don’t change students often think that Newton’s Second Law will yield the same results. This demonstration shows that is not true. This is a step-by-step analysis of tension force as a function of...