Measuring Speed in the Laboratory

The video tutorial explains how to measure speed in a laboratory setting using the equation speed equals distance over time. It covers three experiments: using a stopwatch to measure the speed of a marble on a slope, using a light gate to measure the speed of a trolley, and measuring the speed of an oil drop on a tile. The tutorial emphasizes the importance of accuracy and minimizing human error in time measurements.

What is the basic equation for calculating speed?

• Speed equals distance over time

• Speed equals time minus distance

• Speed equals distance times time

• Speed equals time over distance

Which tool is used to measure time accurately in the laboratory?

• Stopwatch

• Ruler

• Balance

• Thermometer

How do you convert 3 minutes and 7.38 seconds into seconds?

• 187.38 seconds

• 187.08 seconds

• 180.08 seconds

• 180.38 seconds

In the first experiment, what was the average time taken for the marble to travel from A to B?

• 1.23 seconds

• 1.21 seconds

• 1.25 seconds

• 2.08 seconds

What was the calculated average speed of the marble in the first experiment?

• 0.57 meters per second

• 0.569 meters per second

• 0.7 meters per second

• 1.23 meters per second

What equipment was used in the second experiment to reduce human error?

• Stopwatch

• Balance

• Light gate

• Thermometer

What was the average time recorded for the card passing through the light gate?

• 0.76 seconds

• 0.78 seconds

• 0.72 seconds

• 0.74 seconds

In the third experiment, what was the time taken for the oil drop to travel from A to B?

• 32.13 seconds

• 34.09 seconds

• 30.09 seconds

• 66.22 seconds

What was the distance between points A and B in the third experiment?

• 5 centimeters

• 8 centimeters

• 10 centimeters

• 3 centimeters

What was the calculated speed of the oil drop in meters per second?

• 0.0015 meters per second

• 0.00015 meters per second

• 0.15 meters per second

• 0.015 meters per second