57 lines
1.4 KiB
Markdown
57 lines
1.4 KiB
Markdown
# glowing pendulum quiz answers
|
|
|
|
construct a pendulum that glows using acceleration.
|
|
|
|
## Name
|
|
|
|
## Directions
|
|
|
|
Use this activity document to guide your work in the [glowing pendulum tutorial](/lessons/glowing-pendulum/tutorial)
|
|
|
|
Answer the questions while completing the tutorial. Pay attention to the dialogues!
|
|
|
|
## 1. Why are you creating a 'forever' loop?
|
|
|
|
<br/>
|
|
|
|
We are creating a forever loop to constantly display the appropriate brightness on the LED display.
|
|
|
|
## 2. Write the line of code to measure the acceleration with respect to the "y" axis and store this value in a local variable called 'acceleration'.
|
|
|
|
<br/>
|
|
|
|
```blocks
|
|
let acceleration = input.acceleration("y")
|
|
```
|
|
|
|
## 3. After storing the acceleration in a variable, write the code to take the absolute value of the acceleration, and store this value inside 'acceleration'.
|
|
|
|
<br/>
|
|
|
|
```blocks
|
|
let acceleration = input.acceleration(Dimension.X)
|
|
let accelerationAbsolute = Math.abs(acceleration)
|
|
```
|
|
|
|
## 4. Write the code to use the acceleration value from question 3 to set the brightness on the BBC micro:bit.
|
|
|
|
<br/>
|
|
|
|
```blocks
|
|
let accelerationX = input.acceleration(Dimension.X)
|
|
let accelerationAbsolute = Math.abs(accelerationX)
|
|
let accelerationDivided = accelerationX / 4
|
|
led.setBrightness(accelerationX)
|
|
```
|
|
|
|
## 5. Write the code that tuns all the LEDs on (as the image displays below)
|
|
|
|
|
|
|
|
<br/>
|
|
|
|
```
|
|
led.plotAll()
|
|
```
|
|
|