ĐO TÓC ĐỘ

Open Ended

What tools can be used to measure the speed of a cyclist?

Multiple Choice

Which items are required to prepare for the experiment to measure the speed of a toy car using a stopwatch?

• Flat board, ruler, marker pen, stopwatch, thin book, toy car

• Flat board, protractor, marker pen, stopwatch, thick book, toy car

• Flat board, ruler, marker pen, digital timer, thin book, toy car

• Flat board, ruler, marker pen, stopwatch, thick book, toy car

Open Ended

Describe the steps to measure the speed of a toy car using a stopwatch and a ruler.

Open Ended

Explain why it is necessary to take the average value after performing the measurement three times in the toy car experiment.

Multiple Choice

What is the purpose of using a stopwatch in the experiment with the toy car and inclined plane?

• To measure the distance traveled by the car

• To measure the time taken for the car to travel from start to finish

• To measure the speed of the car directly

• To measure the angle of the inclined plane

Multiple Choice

Which of the following is the correct order of steps when using a stopwatch to measure time?

• Press RESET, press START, press STOP

• Press START, press STOP, press RESET

• Press STOP, press RESET, press START

• Press START, press RESET, press STOP

Open Ended

What are some difficulties you may encounter when using a stopwatch to measure the speed of a toy car in an experiment?

Multiple Choice

According to the experiment setup in the images, what equipment is needed to measure the speed of a moving object using a digital timer and photoelectric gates?

• Stopwatch, measuring tape, toy car

• Photoelectric gates, digital timer, wires, toy car with light-blocking plate, weight, pulley, string, ruler

• Digital timer, measuring tape, toy car, stopwatch

• Photoelectric gates, stopwatch, toy car, ruler

Open Ended

Describe the main differences between measuring speed using a stopwatch and using photoelectric gates.

Multiple Select

Which of the following are advantages of using photoelectric gates to measure speed compared to using a stopwatch?

• Higher accuracy of results

• Lower equipment cost

• Easier to use

• Suitable for laboratory measurements

Multiple Choice

Which device can be used to measure the time in order to determine the speed of a moving object?

• Stopwatch

• Thermometer

• Barometer

• Compass

Open Ended

Give some examples to illustrate the necessity of measuring speed in daily life.

Multiple Choice

Why is measuring the speed of vehicles important in traffic?

• To identify vehicles exceeding speed limits and ensure safety

• To measure fuel consumption

• To check vehicle weight

• To determine the color of vehicles

Multiple Choice

In production and exploitation, measuring wind speed helps to:

• Determine wind direction for effective pesticide spraying

• Measure temperature

• Check soil quality

• Estimate rainfall

Multiple Choice

Which activities require measuring the speed of athletes to determine the winner?

• Running, swimming, cycling

• Painting, singing, dancing

• Cooking, gardening, reading

• Writing, drawing, speaking

Multiple Choice

Which measuring tool is most suitable for measuring the swimming speed of a person?

• Stopwatch

• Digital timer with photoelectric sensor

• Ruler

• Thermometer

Open Ended

Discuss the advantages and disadvantages of using a wristwatch versus a mobile phone application to measure the speed of a moving ball on the floor.

Multiple Choice

Based on the table of distance readings from the odometer, what is the total distance traveled by the motorcycle from 6:30 to 8:00?

• 20 km

• 40 km

• 60 km

• 80 km

Open Ended

Explain why the motorcycle's speed remained constant throughout the trip, based on the calculations and data provided.

Multiple Select

Select all correct statements about the motion of the motorcycle based on the data provided.

• The motorcycle traveled equal distances in equal time intervals.

• The speed of the motorcycle changed during the trip.

• The motorcycle moved with a constant speed.

• The total distance traveled was 60 km.

Open Ended

Why is it important to review and remember previously learned knowledge before starting a new lesson on speed and traffic safety?

Multiple Choice

What is the main topic students are asked to prepare for in the homework instructions?

• Bài 10. Quy tắc giao thông đường bộ

• Bài 11. Tốc độ và an toàn giao thông

• Bài 9. Biển báo giao thông

• Bài 12. Xử lý tình huống giao thông

Open Ended

Reflecting on today's lesson, what is one thing you learned about measuring speed that you found interesting or useful?

Multiple Choice

What tools can be used to measure the speed of a cyclist as shown in the image?

• Speedometer and stopwatch

• Thermometer and barometer

• Compass and ruler

• Altimeter and hygrometer