I made ScienceFix.com to share my favorite demos that I do in my middle school science classes.  

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  • Something Funny Happened on the Way to the Moon
    Something Funny Happened on the Way to the Moon
    by Sara Howard
  • NOVA - Origins
    NOVA - Origins
    starring Neil Degrasse Tyson
  • Human Body: Pushing the Limits
    Human Body: Pushing the Limits
    starring Bray Poor

Entries in forces (16)


Books Smash Eggs

Eggs have an arch design in which compression forces are diverted from the top and bottom of the egg down to the sides. How much compression force can an egg take before it's smashed?  Watch the video!



How does a pendulum work? Why can't the weight of the pendulum ever go as high as the starting height? Watch the video to find out.


Video Demo: Newton's 3rd Law

A simple demonstration of Newton's 3rd law of motion in action.  A rubber band under tension is cut, launching both the sled and the launching mechanism in equal and opposite directions.


Video Demo: Adding Forces

This is a fun and easy demo to teach what happens to objects when forces are acting in the same direction.  A series of balls are dropped together, one on top of another. The forces are added together, creating a larger force that propels the top ball to a much greater height.


Video Demo: Apple Inertia

Inertia is the tendency of an object to resist a change in its motion.  An apple and a knife are moving downward.  The counter-top applies an unbalanced force upward on the knife.  The knife decelerates, but the apple does not.  The apple decelerates only when the knife handle applies a force upward on it.