Work, Power, and Simple Machines

Categories Physics

Course Description

Work, Power, and Simple Machines is a hands-on physics module that explores how we harness energy to perform tasks more efficiently. From lifting heavy objects to building towering structures, the principles of work and power—along with the clever use of simple machines—make it all possible.

This lesson breaks down the science behind everyday tools and actions, helping learners understand how force, distance, and time interact to shape the physical world. Whether you’re a student, engineer, or curious thinker, this course connects theory to practical problem-solving

What You’ll Learn

🔧 By the end of this lesson, you’ll be able to:

  • Define work in physics:
    • Work = Force × Distance
      • Understand that work is only done when a force causes movement in the direction of the force
      • Explore examples like pushing a box, lifting weights, or pulling a sled
  • Explore power as the rate at which work is done:
    • Power = Work ÷ Time
      • Learn how power measures efficiency and speed of energy use
      • Compare high-power vs low-power systems (e.g., engines, athletes, machines)
  • Identify the six types of simple machines and their uses:
    • Lever – lifts or moves loads with less effort (e.g., crowbar, seesaw)
    • Pulley – changes direction of force and reduces effort (e.g., flagpole, crane)
    • Inclined Plane – spreads force over distance (e.g., ramp)
    • Wheel and Axle – reduces friction and eases movement (e.g., cart, doorknob)
    • Screw – converts rotational force into linear motion (e.g., jar lid, drill)
    • Wedge – splits or cuts objects (e.g., axe, knife)
  • Understand mechanical advantage, the factor by which a machine multiplies input force:
    • Learn how simple machines reduce effort and increase efficiency
    • Explore real-world applications in construction, transportation, and everyday tools

Who This Lesson Is For

This lesson is ideal for learners beginning their study of physics, students in engineering or technical fields, and anyone interested in how tools and machines make work easier

A free course by

Course Duration: 45m
Course level:Beginner
Start Learning

Requirements

  • Basic math skills for calculating work and power
  • Interest in physical science and practical tools

Target Audience

  • Middle and high school science students
  • First-year college physics or engineering majors
  • Educators teaching mechanics and energy
  • DIY enthusiasts and aspiring engineers
  • Lifelong learners curious about how tools work