1. If both the wheels spin in the opposite direction at different speed, What happen to the robot?

• The robot steer towards the side of the side of the wheel that is spinning at a faster speed.

• The robot steer towards the side of the side of the wheel that is spinning at a slower speed.

• The robot move forward

• The robot move backward

2. There are various ways to build and program wheeled robots to move around. rero:micro uses a ___________; it has two independent drive wheels.

• left wheel

• right wheel

• differential drive system

• wheel spin

3. Drive wheels are wheels that are attached to motor, and thus,_________

• provide robot to move around

• program wheeled robot to move around

• provide the driving force to move the robot

• wheels spin in opposite direction.

4. ''50" in the block represents..... and "100" is the....

• maximum speed, relative value

• minimum speed, relative value

• relative value, maximum speed

• relative value, minimum speed

5.Based on the picture,When both wheels spin in opposite direction at the same speed, rero:micro will move ia a straight to .....

• turn left at 50

• turn right at 50

• move forward at 50

• move backward at 50

6. 8.Based on the picture,When both wheels spin in opposite direction at the same speed, rero:micro will move ia a straight to .....

• turn left at 50

• turn right at 50

• move forward at 50

• move backward at 50

7.Based on the picture, if both the wheels spin in same direction at the same speed, the robot will __________.

• turn left at 50 (rotate about the central point of the axis)

• turn right at 50 (rotate about the central point of the axis)

• move forward at 50

• move backward at 50

8. Based on the picture below,if both the wheels spin in opposite direction at different speed, the robot steer toward the side of wheel that is spinning ______________.

• at a slower speed

• at a faster speed

• and will move in a straight line

• and rotate about the central point of the axis

9. Based on the coding below , if both the wheels spin in opposite direction at different speed, the robot steer toward the side of wheel that is ______________ while you press on button A.

• run to left motor at 40

• run to right motor at 60

• move in a straight line

• rotate about the central point of the axis

10. Based on the coding below , if both the wheels spin in opposite direction at different speed, the robot steer toward the side of wheel that is ______________ while you press on button B

• rotate about the central point of the axis

• move in a straight line

• run to left motor at 70

• run to right motor at 30