(7) Speed/Velocity/Acceleration

Acceleration of an object happens when it ________

• slows down
• speeds up
• changes direction
• all of the these

Tags

NGSS.MS-PS2-2

The correct equation to calculate speed is

• distance ÷ time
• time/distance
• distance x time
• distance/time²

Which of the following best describes the velocity of an object?

• 100 miles/hour south
• 65 miles
• 20 miles east
• 40 meters per second

Tags

NGSS.MS-PS3-1

What is the speed of a car that travels 400 meters in 20 minutes? (6.8C)

• 20 miles/hr

• 20 m/min

• 800 m/min

• 200 miles/hr

What is the speed of this object at 3 seconds?

• 5 m/s
• 45 m/s
• 5 s/m
• 45 s/m

Tags

CCSS.HSF.IF.B.4

Which runner stopped for a rest?

• Albert
• Bob
• Charlie

Tags

NGSS.MS-PS3-1

Which one describes velocity?

• 40 m

• 40 m/s east

• 40 m east

• 40

The vehicles pictured are all traveling at a speed of 15 m/s but only the truck has a changing velocity. The truck has a changing velocity because -

• it accelerates faster than the other 2 vehicles
• it is traveling in the opposite direction from the other 2 vehicles
• it is traveling on a curve in the road
• it needs a large amount of force to move

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

What is the difference between the velocity and the speed of an object?

• Velocity is a change in distance over time, speed is the change in direction over time
• Velocity has a direction associated with it, while speed has no specific direction
• Velocity has no direction associated with it, while speed has a specific direction.
• Velocity is the change in speed over time, while speed is the change in distance over time.

slowing down at a stop sign

• speed

• velocity

• acceleration