Student Learning Objectives
Lessons / Lecture Notes
Important Equations
Example Problems
Pencasts
Applets and Animations
Student Learning Objectives
Lessons / Lecture Notes
The Physics Classroom (conceptual)
PY105 Notes from Boston University (algebra-based):
Introductory physics notes from University of Winnipeg (algebra-based):
HyperPhysics (calculus-based)
PHY2048 notes from Florida Atlantic University (calculus-based):
PHY2043 notes from Florida Atlantic University (calculus-based)
General Physics I notes from ETSU (calculus-based)
Explore the forces at work when you try to push a filing cabinet. Create an applied force and see the resulting friction force and total force acting on the cabinet. Charts show the forces, position, velocity, and acceleration vs. time. View a Free Body Diagram of all the forces (including gravitational and normal forces). Learn how friction causes a material to heat up and melt. Rub two objects together and they heat up. When one reaches the melting temperature, particles break free as the material melts away. Explore forces, energy and work as you push household objects up and down a ramp. Lower and raise the ramp to see how the angle of inclination affects the parallel forces acting on the file cabinet. Graphs show forces, energy and work. The Roller Coaster model explores the relationship between kinetic, potential, and total energy as a cart travels along a roller coaster. Users can create their own roller coaster curve and observe the resulting motion.
Example Problems
Problem 1
In the figure below, two forces, F_{1} and F_{2}, pull a 50.0 kg crate. The magnitude of F_{1} is 215 N and it is applied at a 42.0^{o} angle. The magnitude of F_{2} is 55.0 N. If the crate is accelerating to the right at a rate of 0.500 m/s^{2}, find the coefficient of kinetic friction between the crate and the floor. (Solutions)
Problem 2
In the figure below, a block of weight w_{1} = 100.0 N on a frictionless inclined plane of angle 15^{o} is connected by a cord over a massless, frictionless pulley to a second block of weight w_{2} = 30.0 N. (a) What are the magnitude and direction of the acceleration of each block? (b) What is the tension in the cord? (Solutions)
Pencasts
Newton's Laws
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(Note: Please allow ~30 seconds after hitting play for the entire file to load. Click here to download a pdf file of this problem.)
Applets and Animations
Forces in 1 Dimension
Friction
Hooke's Law
A simple animation illustrating Hooke's Law
Inclined Plane
The applet show a mass sliding down an inclined plane. The can control the initial velocity of the mass as well as the coefficient of friction.
The Ramp
Roller Coaster
Forces on a Pendulum
The weight, force due to tension, and total force exerted on the bob of a pendulum are shown.
(Interrupted) Pendulum
This applet displays a pendulum oscillating back and forth. The user can vary the height of a pin so that the pendulum’s path is interrupted.
Conical Pendulum
This applet shows a conical pendulum (i.e. a mass connected to a string rotating in a horizontal circle). The user can control the length of the string and the frequency.
Mass Moving in a Vertical Circle
A mass is in circular motion in the vertical plane. We show the weight and force exerted by the tension in the string.