User Manual

Find

rubber bands of dierent sizes.

Load the smallest rubber band into your Torque Twister™. Rotate the Speed

Winders™ vehicle crank

times. Then launch it, measure the distance traveled with

a ruler or measuring tape, and record the measurement in the Test Log section.

Pick up the medium-size rubber band and load it onto your Speed Winders™

vehicle. Rotate the crank

times and repeat the experiment. Write down

the result.

Now do the exact same experiment using the largest rubber band.

Compare the

distances to see whether they are the same or not.

id the length of the rubber band aect how far your Speed

Winders™ vehicle traveled? How about the thickness of each

rubber band? That's because rubber bands of dierent lengths

and thicknesses have more or less STRETCH.

emember what we already learned about potential energy. The

more energy you store, the more is released as kinetic energy.

So more STRETCH can deliver more power to the wheels- even

when you rotate the crank the same number of times!

#2: IS BIGGER ALWAYS BETTER?

DID YOU KNOW YOU CAN USE ALMOST ANY RUBBER BAND

TO POWER YOUR SPEED WINDERS™ VEHICLE?

DISTANCE TRAVELED (INCHES)

TEST LOG

SIZE OF RUBBER BAND

SPEED LAB!

SMALL

MEDIUM

LARGE

rab a few rubber bands with dierent thicknesses and lengths from somewhere

in your house and let’s see how the size of the rubber band can aect how far

your Speed Winders™ vehicles travel.

S-T-R-E-T-C-H !

more rubber bands of the same size to the engine.

Will the number of rubber bands aect the distance your

Torque Twister™ travels as well?

BONUS CHALLENGE:

6 7