Beakman challenge where he wraps a paper towel around the end of a paper towel tube and then fills the tube halfway with salt. Then pushes a plunger handle into the salt to try to break the tissue but he can't do it. He explains that this is because the push of the handle expels the air that the salt crystals come together to absorb all of the force and none is left for the tissue.
Through a cartoon movie, Beakman explains why your stomach feels weird on a roller coaster and why the biggest hill is the first one. He hangs a bowling ball from the ceiling with a cable and then swings the ball to squish a watermelon (energy in and energy out). He then puts himself where the watermelon was and shows that the ball can't swing any farther than the point at which he lets go. Beakman goes on to explain that centripetal force prevents us from falling out of the roller coaster and demonstrates it. He uses a tray containing a glass of milk and a cupcake and quickly spins it around to show that nothing falls off. He then explains why inertia keeps us from falling to the ground and brings all of the concepts together.
Hazel Fanny the Science Granny demonstrates balanced and unbalanced forces using a game of tug of war. When forces are in balance, they are equal, and no movement occurs. When forces are unbalanced, they are unequal, and movement occurs.
Beakman defines machines and acts like Archimedes to explain why a screw is a machine. He illustrates how he used a screw mechanism to remove water from a container to reduce the amount of work required to complete the task. Beakman then explains more about mechanical advantage and simple machines like the inclined plane.