Work Comparsion QT Movie (240K)
The work done on three blocks of different mass are compared when the same size force acts over the same distance. Displayed is the transformation of work into kinetic energy of the blocks. Work Comprsion IP Simulation

Air Drag on a Cyclist QT Movie (480K)
A cyclist produces a constant force to propel himself and his bicycle along. The force he produces is determined by the maximum speed he can reach when there is air resistance. If he starts from rest his speed will reach a terminal velocity when the force he produces is equal to his air drag. Air Drag on a Cyclist Problem - Air Drag on a Cyclist IP Simulation

Pushing a Puck QT Movie (652K)
A puck is pushed along a rough, horizontal surface by a constant force that makes an angle with the horizontal. The work done by the applied force and that of friction are displayed along with the velocity and acceleration of the puck. Pushing Puck IP Simulation - Work done in Pushing Puck Problem

Jumping Flea QT Movie (652K)
A flea jumps with a certain speed and reaches a height which is less than the maximum height the flea could jump if no energy were lost due to air resistance. Graphed is the flea's mechanical, potential , and kinetic energy as he sail through the air. Jumping Flea Problem - Jumping Flea IP Simulation

Energy of an Oscillating Bob
Total Mechanical Energy greater than Zero (336K)
Zero Mechanical Energy Oscillation (312K)
A bob oscillates vertically on the end of a spring. The various forms of energy are displayed: the bob's gravitational potential energy, the spring's potential energy, the bob's kinetic energy, and the total mechanical energy of the system of the bob and spring. Energy of Oscillating Bob IP Simulation