Measuring Motion

A runner races in the 100 meter dash. It takes him 10 seconds to finish. What is his average speed?

• 10 m/s

• 1000 m/s

• 100 seconds

• 10 seconds

What is speed?

• how much an object’s position changes
• how far an object moves
• how long an object moves
• how far an object moves in a certain amount of time

Tags

NGSS.MS-PS3-1

What is the difference between speed and velocity?

• Direction is included in speed but not velocity

• Direction is included in velocity but not speed

• They are the same thing

A car heading east at 43 km/h and a car heading west at 43 km/h have

• the same speed but different velocities

• the same velocity but different speeds

• the same speed and velocity

• different speeds and different velocities

What is the correct equation for speed?

• speed = distance x time

• speed = time / distance

• speed = distance / time

• speed = distance + time

Tags

NGSS.MS-PS3-1

What is the metric unit for speed?

• mph

• m/s

• km

• cm³

Tags

NGSS.MS-PS3-1

If you ran 10 meters in 2 seconds, how fast did you run?

• 20 m/s

• 12 m/s

• 0.2 m/s

• 5 m/s

Tags

NGSS.MS-PS3-1

Which of the following helps us to see if something is moving?

• position
• reference point
• speed
• velocity

What is a reference point?

• something that appears to stay in place
• something that appears to keep moving
• something that stays at the same velocity
• something that stays at the same acceleration

What is an object’s change in position over time called?

• speed
• acceleration
• friction
• motion