Downforce+Crazy

= =  Does changing the size of the sprocket have impact on the distance a mouse-trap car can travel?

Task 1: Answer these questions = = 1. What is a sprocket? anther word for a cog. Cogs or sprockets are like gears - they transmit force from the front of something to the back of something.

2. How does a mouse-trap powered car work? You get 2 steel axles and 4 round wheels. There is a mousetrap sitting on the base. You put a stick into the spring of the mousetrap and you tie a piece of string onto the end of the stick. You wind the other end of the string around the axel. When you set off the mousetrap it releases a force and the string starts to unwind and the stick pulls upwards - this makes the wheels turn and the car move. (See my diagram below - my car will have 4 wheels). epcepit it wil have for wheel's.

__1. Independent variable:__ changing the size of the mousetraps: small, medium and large

__2. Dependent variable:__

The distance that the car travels

__3. Controlled variables:__ the size of the wheels, the size of the base, the bar and the length of the string

What is the hypothesis for your experiment? The bigger the mousetrap, the further the mousetrap car will go.

= = = = = = = __Task 4: What equipment do you need for your experiment?__ = A mouse trap, wood (will be splied by my dad). nine smail steel pipes 70cm of string = =

= =

Task 5: List all steps in the method of your experiment (try and include a diagram or video that helps explain):



__**Task 6: Observation and discussion**__

Note down what you noticed as you did each experiment. Try and include an image or a video or photos of your experiment.

__Experiment 1 Observations:__

__Experiment 2 Observations:__



__Experiment 3 Observations:__

= __Task 7: Results__  =

Take a screen shot of your results table. Upload it and put it here:

__Task 8: Conclusion__
Write a statement that says whether your hypothesis was wrong. If you were wrong, why were you wrong?