Understanding Accelerometers and Motion

The video explains the concept of Gs as a unit of acceleration and how accelerometers measure them. A demonstration using balloons in a van illustrates how different gases react to acceleration due to pressure differences. The video also covers various types of accelerometers, including MEMS, and their applications in safety systems and devices like cell phones.

What is the primary function of an accelerometer?

• To measure distance

• To measure acceleration

• To measure time

• To measure speed

In the balloon demonstration, what gas was used to fill the orange balloon?

• Helium

• Nitrogen

• Carbon Dioxide

• Oxygen

During forward acceleration, which direction did the air-filled balloon move?

• Forward

• Backward

• Upward

• Downward

What law of motion explains the behavior of the air-filled balloon during acceleration?

• Newton's Second Law

• Newton's First Law

• Newton's Third Law

• Law of Universal Gravitation

What happens to the helium balloon when the van travels in a circle at constant speed?

• It moves upward

• It moves inward

• It moves outward

• It stays still

What is a simple classroom accelerometer mentioned in the video?

• A spring scale

• A cork in a jar of water

• A pendulum

• A thermometer

What does MEMS stand for in the context of accelerometers?

• Mechanical-Electronic Measurement Systems

• Micro-Electro-Mechanical Systems

• Mechanical-Electro-Measurement Systems

• Micro-Electronic Measurement Systems

How many axes do modern three-axis accelerometers measure?

• One

• Two

• Three

• Four

What is one application of accelerometers in vehicles?

• Measuring fuel efficiency

• Monitoring tire pressure

• Controlling air conditioning

• Adjusting seat position

How many MEMS are typically found in modern cars?

• 10

• 25

• 50

• 100