Observe the following 2 pictures and based on the knowledge of light scattering of colored objects, please indicate in which case the eye will receive stronger infrared rays.

Students conduct group discussions.

Proceed to draw a connection diagram between the Arduino processing "brain" part and the motor part of the robot car of the implementing team.

TIME: 5 minutes

Students listen to the teacher's instructions and study materials, and connect programming blocks to their corresponding functions.

A

1. The block of code used to start the Arduino program.

B

2. Infinite loop block.

C

3. Conditional block If…. then….

D

4. The command block controls motor M1 to rotate forward at 100% capacity.

E

5. M3 motor stop command block.

F

6. The command block controls motor M4 to reverse at 50% capacity.

G

7. Greater than comparison conditional blocks,

less than, equal to.

H

8. Analog signal reading command block.

I

9. M2 motor control command block to rotate

up to 100% power for 5 seconds

Students conduct group discussions.

Draw a block diagram of the programming block for the robot to perform the following task: "Make the robot run forward for 3 seconds, then make the car run backward for 3 seconds."

TIME: 5 minutes

1. What is speed?

................................................................ ................................................................ .................................

Some units of speed measurement:

................................................................ ................................................................ .................................

2. Formula to determine the speed of an object:

................................................................ ................................................................ .................................

3. From the speed formula, to determine the speed of an object, we need to determine 2 quantities:

.......................................................and.........................................................................

3. Please note the appropriate units for the following quantities:

Speed: m/s Distance: ................... Time: ........................

Students work in groups.

Discuss and propose speed measurement options.

Then proceed to execute the plan to measure the speed of the robot car corresponding to the power levels of 50%, 100% and any value respectively.

TIME: 20 minutes

Distance measured

(Unit of measurement:………)

Measured time (Unit of measurement:………)

Speed ​​(Unit………..)

1

2

3

Medium:

Distance measured

(Unit of measurement:………)

Measured time (Unit of measurement:………)

Speed ​​(Unit………..)

1

2

3

Medium:

Distance measured

(Unit of measurement:………)

Measured time (Unit of measurement:………)

Speed ​​(Unit………..)

1

2

3

Medium:

1. The light source is

................................................................ ................................................................ .................................

2. The bright object is

................................................................ ................................................................ .................................

3. Our eyes perceive light when

................................................................ ................................................................ .................................

4. Our eyes can see an object when

................................................................................................................................... 5. Reflection of light is ............................................................................................

................................................................................................................................... 6. Law of reflection of light ...................................................................................

................................................................ ................................................................ ...............................

................................................................ ................................................................ ...............................

1. We see the color of an object because

................................................................ ................................................................ .................................

2. White light (like sunlight) is a mixture of how many colors?

................................................................ ................................................................ .................................

3. Under sunlight, what color will the following objects scatter? What color will our eyes perceive? Draw the path of the light rays from the object to the eyes and note the color of the light rays.

Students conduct group discussions.

Based on the knowledge you have just learned about light and the principle of infrared sensors. Answer the following questions.

TIME: 5 minutes.

................................................................ ............

................................................................ .............

(1)

(2)

(3)

(4)