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AGC/United Learning • 1560 Sherman Ave., Suite 100 • Evanston, IL 60201 • 800-323-9084

OTHER FOOT. BRYCE: HOW...LIKE THIS? CRAIG BULAWKA: JUST LIKE THAT! BRYCE: YEAH, I CAN SEE WHY YOU CALL IT THE DIAGONAL STRIDE, HUH. CRAIG BULAWKA: IT’S JUST A LITTLE BIT OF TEMPO AND WEIGHT SHIFT. BRYCE: YEAH. IT’S JUST A MATTER OF BALANCE AND RHYTHM. CRAIG BULAWKA: GOOD JOB! BRYCE: ALL RIGHT!\WHOA! CRAIG BULAWKA: YOU’RE A NATURAL! BRYCE: RIGHT! DARREN: YOU KNOW, ENERGY CANNOT BE CREATED OR DE- STROYED, ONLY CONVERTED FROM ONE FORM TO ANOTHER. COLLEEN DRIVES HER LEG BACK. HER SKI MAKES CONTACT WITH THE SNOW, AND THIS ACTION PROPELS HER FORWARD. THE KINETIC ENERGY OF COLLEEN’S LEGS AND ARMS IS TRANSFORMED INTO KINETIC ENERGY FOR HER WHOLE BODY. WHEN ENERGY TRANSFERS FROM ONE BODY — OR SYSTEM — TO ANOTHER, WORK GETS DONE. EN- ERGY TRANSFERRED FROM THE WIPER BLADES TO THE SNOW. THAT’S WORK. COLLEEN: THE MOTOR DRIVES THE PULLEY. THAT PULLS THE CABLE, WHICH RUNS THE LIFT AND TAKES THE SKIERS UP THE HILL. THE ENERGY IS TRANSFERRED FROM THE LIFT SYSTEM TO THE SKIERS. THAT’S WORK. BRYCE: I CAN TRANSFER ENERGY FROM MY ARM TO THE SNOWBALL.\E THAT’S WORK. DARREN: DOING WORK REQUIRES A TRANSFER OF ENERGY. IN A CAR, THAT ENERGY COMES FROM GASOLINE. WE WANT THE CAR TO MOVE — TO CHANGE PLACES. SO THE FUEL THAT GOES INTO BRINGING ABOUT THAT CHANGE IS USEFUL. WE CALL IT “USEFUL ENERGY.” COLLEEN: THE ENERGY I TRANSFER TO SKI ALONG THE TRAIL IS USEFUL ENERGY. IT’S THE AMOUNT THAT ACTUALLY BE- COMES KINETIC ENERGY. BRYCE: THE ENERGY I TRANSFER TO THE SNOWBALL IS USE- FUL ENERGY. REALLY!

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