In this video Paul Andersen explains how contact forces result from interatomic forces. The following forces are explained at the interatomic level: normal force, applied force, friction force, tension force, spring force, and buoyant...

I'm sure you've heard of Isaac Newton and maybe of some of his laws. Like, that thing about "equal and opposite reactions" and such. But what do his laws mean? And how do they help us understand the world around us? In this episode of...

After 25 years of teaching physics, I realized I had been wrong about when you can use the equation Work due to nonconservative forces = Change in mechanical energy. In this video, I break down my mistake, show the correct way to think...

Discover how buoyancy and tension interact in this physics experiment! Learn why a wood sphere attached to a beaker changes the scale reading, even though it’s submerged like a steel sphere. Perfect for students exploring forces,...

A visual story about buoyancy, two submerged spheres, a force sensor, and a digital scale.

Understand the four key types of forces—gravitational, normal, frictional, and tension—and how they affect motion. Learn to classify, analyze, and apply these forces to solve mechanics problems

Discover how buoyant force impacts scale readings in this engaging physics lesson. Using free body diagrams and Newton's laws, we analyze scenarios involving submerged objects, tension forces, and buoyant forces. Watch as we break down...

Discover the fascinating world of physics with our latest video on buoyant force! Join us as we conduct an experiment demonstrating the concept of buoyant force and the weight of the fluid displaced by an object. Learn how to calculate...

This Free Response Question includes the following concepts: Electrostatic Forces, Gauss's Law, Electric Fields and work done on a charged particle when moving through an electric potential difference.<br/>

This Short Answer question also works as a part of the AP Physics C: Mechanics curriculum.

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...

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...

This video covers Three Dimensional Vectors. This video goes over the various properties associated with three dimensional vectors. 4 intermediate examples including a static equilibrium problem are covered.

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

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...

This problem is from the Meriam and Kraige Statics textbook. I do not own this problem and I am not using it for commercial purposes.



In this problem you need to always start with a free body diagram. Notice that in order to...

The maximum friction force that can be a applied on a stationary object is F_max = u_s N

Will block 1 slide down the hill? What is the inequality that needs to be satisfied?

mechanical energy problem 4 Part 1

To solve problems like these, make isolated cut selection to find each of the variables one at a time. Then use that fact that under reasonable assumptions (massless rope and frictionless pulleys) then the tension in the cable must be...

A 0.300 kg mass rests on a 0.395 m long, 0.764 kg, uniform wooden plank supported by a string as shown in the figure. If the mass is 0.274 m from the wall and the angle between the string and the plank is 32.1°, (a) What is the force of...

If a pulley is in static equilibrium and the following is true:

1) Rope is mas
sless
2) Pin is fr

ictionless

Then the tension in the cable will be constant everywh

ere along the cable.

There is only 1 force...

Mechanical energy problem 4 part 2

Vector Man and the police have no clue about how to interpret Lexi Luthor’s blueprints… This looks like a job for Lotus! This lesson will explain the steps needed to algebraically add and subtract 2D vectors.

Definitions included:...