Revolutions and Speed Calculations

The video tutorial covers two main topics: calculating speed and comparing revolutions per minute (RPM). Maria and Nadia's trip from Philadelphia to Toronto is used to explain how to calculate speed by dividing distance by time, resulting in a speed of 60 mph. The tutorial then explores equations representing speeds greater than 60 mph. In the second part, the RPM of vinyl records is compared, with 'oldies' rotating at 78 RPM and 'goodies' at 45 RPM, demonstrating how to calculate RPM by dividing revolutions by time.

What was the constant speed Maria and Nadia maintained during their trip?

• 50 miles per hour

• 60 miles per hour

• 70 miles per hour

• 80 miles per hour

How many miles did Maria and Nadia travel on the first day?

• 300 miles

• 240 miles

• 200 miles

• 360 miles

Which equation represents a speed greater than Maria and Nadia's?

• y = 55x

• y = 65x

• y = 60x

• y = 50x

If an equation is y = 70x, what does the coefficient 70 represent?

• Acceleration

• Speed

• Time

• Distance

What is the RPM of 'oldies' vinyl records?

• 60 RPM

• 45 RPM

• 90 RPM

• 78 RPM

How many revolutions does track one of 'goodies' make in three minutes?

• 180 revolutions

• 150 revolutions

• 225 revolutions

• 135 revolutions

What is the RPM of track two of 'goodies'?

• 78 RPM

• 60 RPM

• 45 RPM

• 30 RPM

Which has a greater RPM, 'oldies' or 'goodies'?

• Oldies

• Goodies

• Both have the same RPM

• Cannot be determined

How many revolutions per minute does track three of 'goodies' have?

• 78 RPM

• 60 RPM

• 30 RPM

• 45 RPM

What is the total number of revolutions for track three of 'goodies' in five minutes?

• 180 revolutions

• 200 revolutions

• 225 revolutions

• 250 revolutions