That's right. We never see anything as it happens. We only see the past.

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.

This problem is about how the gravitational force on a ball changes as it moves up away from a small asteroid.

This problem is about determining the constant electric field inside a parallel place capacitor in terms of electric potential and distance between the plates.

This problem is about finding the kinetic energy of an electron in orbit around a proton

This problem is about using conservation of energy to determine the final kinetic energy of a charged particle released from the positively charged plate of a parallel plate capacitor.

This problem is about the net electric field caused by two positive charges.

My solutions to Free Response Question #3 from the 2017 AP Physics 1 Exam. Also included are my reflections on how to get more points on the exam.

This Quantitative/Qualitative Translation question also works as a part of the AP...

My solutions to Free Response Question #4 from the 2017 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...

My solutions to Free Response Question #4 from the 2018 AP Physics 1 Exam. This is short answer question about mechanical waves. Also included are my reflections on how to get perform better on the exam.

Do you suffer from eye strain from digital screens like Smart Phones, Computers & Laptops? Me too! Though my day job is being a DOCTOR, I spend my off-time making animations & browsing Reddit in front of digital screens. In this video, I...

This video shows the process for solving the problem presented in SATs 2022 Paper 3 Q21, which involves finding the coordinates of a point in a rectangle. Specifically, we will examine two identical rectangles, each with a length that is...

This video continues the exploration of a three dimensional cartesian coordinate system.This video covers three basic examples that requires the use of the equation of a sphere.

This video explores the characteristics of waves. It explains the speed of waves, how this value is calculated and the four basic interaction between waves. Other terminology includes: vibration, crest, trough, amplitude, wavelength,...

As we continue our search for earth-like, potentially habitable worlds, we come across an interesting triple-star system called Gliese 667. The smallest of these three stars, Gliese 667 C, is a red dwarf with several planets, one of...

Students will learn about the different frequencies along the electromagnetic spectrum. Vivid animation is used to explore the visible spectrum of light and the colors it allows us to see everyday. The video also investigates various...

Through colorful animations and common everyday examples, this video helps students learn how to measure length and temperature using the metric system. Both the Celsius and Kelvin temperature scales are explained in depth. Emphasis is...

This video is a review of Two Dimensional Vectors. This video goes over applications of vectors. 3 examples are covered illustrating how to solve distance and bearing problems.

Deriving the Parallel Axis Theorem for moment of inertia or rotational inertia.

Learn that by using signed number operations and aligning like terms, you can easily add the coefficients of each pair of terms. The video emphasizes that addition of numbers with negative signs can be written in either order. Overall,...

A 25 kg child is sitting on the edge of a merry-go-round. The merry-go-round has a mass of 255 kg and is rotating at 2.0 radians per second. The child crawls to the middle of the merry-go-round. What is the final angular speed of the...

We need to know the initial velocity of a projectile leaving the Nerd-A-Pult. That means we need the initial speed and the initial angle. This video shows exactly how I measured both.

👉 Learn how to take the derivative of a function. Learn how to find the derivative of a function using the chain rule. The derivative of a function, y = f(x), is the measure of the rate of change of the function, y, with respect to the...

👉 Learn how to take the derivative of a function. Learn how to find the derivative of a function using the chain rule. The derivative of a function, y = f(x), is the measure of the rate of change of the function, y, with respect to the...