Control experiments help scientists study a system in great detail
Now, let us design a control experiment that will be similar to the bicycle ride on the slope. It will help you to record data with better accuracy. Here we are replacing road with an aluminium or wooden plate and cycle with a steel ball or a marble. We are calling it as "Inclined Plane Experiment".
Material required to perform the experiment:
1. An aluminum angle of length 160 cm
2. A marble or a steel ball of diameter 1 inch
3. Stopwatches
Setting up the experiment:
Place one end side of the aluminium angle at a higher point to give it an inclined slope. If the ball is moving too fast, then it will be difficult to take precise measurements. For this, you need to figure out just the right height for the ball to roll down smoothly from the beginning to end.
Process to do the experiment:
1. Choose any one end of the angle and mark a line across its width at 1 or 2 cm. This is your starting point or zero point at 0 cm mark.
2. Now measure the rest of the angle's length and divide it such that each segment is of length 30 cm. (You will get around 5 segments).
3. Raise one side just enough so that if you leave the steel ball from top, it smoothly rolls down till the end.
4. Use stopwatches to record the time it takes to cover each segment.
Note: Please coordinate in your group so that everyone gets a chance to record the time.
[Contributed by administrator on 10. Januar 2018 21:46:47]
Rolling ball experiment
Control experiments help scientists study a system in great detail
Now, let us design a control experiment that will be similar to the bicycle ride on the slope. It will help you to record data with better accuracy. Here we are replacing road with an aluminium or wooden plate and cycle with a steel ball or a marble. We are calling it as "Inclined Plane Experiment".
1. An aluminum angle of length 160 cm
2. A marble or a steel ball of diameter 1 inch
3. Stopwatches
Setting up the experiment:
Place one end side of the aluminium angle at a higher point to give it an inclined slope. If the ball is moving too fast, then it will be difficult to take precise measurements. For this, you need to figure out just the right height for the ball to roll down smoothly from the beginning to end.
Process to do the experiment:
1. Choose any one end of the angle and mark a line across its width at 1 or 2 cm. This is your starting point or zero point at 0 cm mark.
2. Now measure the rest of the angle's length and divide it such that each segment is of length 30 cm. (You will get around 5 segments).
3. Raise one side just enough so that if you leave the steel ball from top, it smoothly rolls down till the end.
4. Use stopwatches to record the time it takes to cover each segment.
Note: Please coordinate in your group so that everyone gets a chance to record the time.