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...

Drawing accurate free-body diagrams is essential for scoring points on the AP® Physics Exams. In this video, Mr. P, an actual AP® Physics Reader, shows you exactly how to draw free-body diagrams the way exam graders want to see them....

Lotus isn’t the only one who has noticed that Ian is up to something… This lesson will explain how dynamic friction is dependent on the normal force and roughness of a surface, but independent of speed and apparent contact...

Lesson 6 (Friction) of Dianna's Intro Physics Class on Physics Girl. Never taken physics before? Want to learn the basics of physics? Need an AP Physics 1 review before the exam? This course is for you! Exercises in this video: Problem1:...

Lesson 14 (Rotation and Torque) of Dianna's Intro Physics Class on Physics Girl. Never taken physics before? Want to learn the basics of physics? Need an AP Physics 1 review before the exam? This course is for you! Exercises in this...

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...

circular motion problem 2

In this video I cover some of the main formulas used for a standard dynamics course:

1) Plane m
otion
2) Project
ile motion
3)
Circular motion
4) Dry Friction
(static and dynamic)
5) Relative motion (for no
n...

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

Here we solve for the velocity of a block as it's sliding up a circular hill using energy methods 1) Find work done by external forces (it's 0). 2) Notice there is negligible rotation so the kinetic energy is just 0.5 m (v2^2 - v1^2). 3)...

Lesson 9 (Work and Energy) of Dianna's Intro Physics Class on Physics Girl. Never taken physics before? Want to learn the basics of physics? Need an AP Physics 1 review before the exam? This course is for you! Exercises in this video: 1....

What is the velocity of the black just BEFORE it hits the spring? Notice that the 2 non conservative forces are your normal force and your friction force.<br/>
i) 2.56m/s
ii)0.0989m

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

mechanical energy problem 4 Part 1

Here we solve for the velocity of a disk as it's rolling up a circular hill using energy methods 1) Find work done by external forces (it's 0). 2) Notice there is rotation so the kinetic energy is 0.5 m (v2^2 - v1^2) + 0.5 I (w2^2 -...

The maximum friction force when stationary is equal to UsN. The friction force when moving is UkN. This is always constant. In almost all cases, Us is greater than Uk (as expected). Wheels undergoing pure roll always experience static...

Kinetic friction summary

Mechanical energy problem 4 part 2

Vector Man rescues a waiter from a burning restaurant, but forgets to put out the fire! This lesson will explain how to draw free body diagrams.<br/>
Definitions included: free body diagram, net external force

A birthday party isn’t complete without cake, music and drama! This lesson will introduce the most common types of contact forces encountered in Physics.

Definitions included: contact force, normal force, friction force, static...

Find the acceleration of the center of mass of the disk. 1. Use F = ma AND M = I alpha 2. Assume pure roll ie a = r alpha 3. Check validity of assumption ie, F less than Fmax 4. If F less than Fmax, THEN assumption is true 5. If F...

Just an intro into friction.

Hey guys, this video covers the intuition behind friction. Friction always acts in the direction opposite to the applied force. Using this and the fact that the static coefficient of friction is different to the kinetic coefficient of...

This video introduces the concept of non-conservative forces, focusing on kinetic friction and air resistance as examples. It explains how these forces cause mechanical energy to change or dissipate within a system, converting kinetic...