Khan Academy Static

4A: Work doesn’t always have to break your back. In physics, it has a different meaning. When a force is applied to an object and results in displacement, work has been done. When an apple falls from a tree, gravity has done work on the object as it descends earthward. And as work is done by gravity on the object, its gravitational potential energy is converted into kinetic energy (which is also why it hurts as it lands on your head, hopefully resulting in a brilliant Newtonian idea). Let’s get moving!

15157_Work_and_the_work_energy_principle.html

15161_Intro_to_springs_and_Hooke_s_law.html

15164_Work_as_the_transfer_of_energy.html

15167_Introduction_to_mechanical_advantage.html

15158_Work_example_problems.html

15165_Conservative_forces.html

15156_Work_and_energy_part_2_.html

15162_Potential_energy_stored_in_a_spring.html

15160_Work_energy_problem_with_friction.html

15163_Spring_potential_energy_example_mistake_in_math_.html

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15166_Power.html