Physical Science Chapter 11 Lesson 2 Questions

What unit is typically used to describe the speed of an in-line skater?

• Kilometers per hour

• Meters per second

• Miles per hour

• Feet per second

Tags

NGSS.MS-PS3-1

The speed of a car is usually described in ______.

• Meters per second

• Kilometers per hour

• Miles per hour

• Feet per second

What is the main difference between instantaneous speed and average speed?

• Instantaneous speed is measured over a long period, while average speed is measured at a particular instant.

• Average speed is computed for the entire duration of a trip, and instantaneous speed is measured at a particular instant.

• Both are measured over the entire duration of a trip.

• Both are measured at a particular instant.

Fill in the blank: Average speed is computed for the entire duration of a trip, and _______ speed is measured at a particular instant.

• constant

• instantaneous

• variable

• uniform

What is the SI unit of speed?

• Kilometers per hour (km/h)

• Meters per second (m/s)

• Miles per hour (mph)

• Feet per second (ft/s)

Tags

NGSS.MS-PS3-1

Speed is the ratio of the distance an object moves to the amount of time the object moves. Two ways to express the speed of an object are ________ speed and instantaneous speed.

• average

• constant

• variable

• uniform

Tags

NGSS.MS-PS3-1

What is the definition of average speed?

• The total distance traveled divided by the total time taken

• The total time taken divided by the total distance traveled

• The speed at a specific moment

• The change in speed over time.

Fill in the blank: Average speed is calculated as the total distance traveled divided by the ______.

• speed

• time

• velocity

• acceleration

What is the average speed if you travel 35 kilometers in 0.4 hour, followed by 53 kilometers in 0.6 hour?

• 44 km/h

• 88 km/h

• 70 km/h

• 53 km/h

Fill in the blank: Average speed is calculated as total distance traveled divided by total time taken. If you travel 88 kilometers in 1 hour, the average speed is ___ km/h.

• A) 44

• B) 88

• C) 70

• D) 53