Thames & Kosmos Solar Mechanics handleiding

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Thames & Kosmos

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Handleiding

HERE’S HOW

1. Find a large plank of wood, or a sturdy

piece of cardboard, or some other ﬂat

panel that is at least three feet by two

feet and that you can use as a ramp.

2. Set up the ramp with one end on a short

block of wood or a thin book so that the

ramp is at a low-grade slope (a slight up-

ward slant).

3. Now time how long it takes both test

cars (A and B) to climb from one end of

the ramp to the other.

Do both cars make it up the ramp?

4. Add another block of wood or book to in-

crease the slope (or steepness) of the

ramp.

5. Again, test both cars on the ramp. Con-

tinue to increase the slope of the ramp

and test the model cars until one of

them can no longer climb the ramp.

6. Now, continue to test the remaining car

on increasingly steep ramps until the

car can now longer climb as well.

Which car could climb the steeper ramp?

Was it the faster car or the slower car

from Experiment 9?

Torque over

speed

YOU WILL NEED

→ test car models A and B

from Experiment 9

→ tape measure or yard stick

→ large plank of wood, or

sturdy piece of cardboard,

or other flat panel

→ wooden blocks or books

→ stopwatch or timer

→ sunny day

Test car B, which was the slower car from

Experiment 9, should have been more ca-

pable of climbing the steeper ramp than

test car A. From the results of these last

two experiments, you can see how gears

can be used to either increase speed or

increase torque depending on what is

needed. The solar panel can provide only

a limited amount of energy, so we have

to use gears to either use that energy to-

wards achieving more speed or more

power.

→

WHAT’S HAPPENING?

Distance (D)

Height (H)

EXPERIMENT 10

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