9.26 Speed and Accel

Match the following terms with their definitions.

• change in velocity per unit time

• Speed

• distance per unit time

• Acceleration

• speed in a given direction

• Velocity

Tags

NGSS.MS-PS3-1

Match the units with their term.

Groups:

(a) Speed

,

(b) Velocity

,

(c) Acceleration

• m/s

• km/hr

• m/s^2

• km/min^2

• mi/hr north

• m/s west

Answer explanation

Speeds are distance per unit time.

Velocities are speeds with a direction, so look for the direction with the units!

Accelerations have the time unit squared (either like m/s² or m/s^2. Sometimes programs won't let us do the exponent so we have to use the ^ to show the exponent.

Tags

NGSS.MS-PS3-1

The segment label with the description.

• the person stopped

• Segment A

• returned to starting location

• Segment B

• fastest speed (30 km in 30 min)

• Segment C

• the person traveled 30 km in 2 hrs

• Segment D

Tags

NGSS.MS-PS3-1

What was the speed of the object in Segment C?

• 30 min

• 30 km

• 1 km / min

• 0 km / hr

• 2 km / min

Tags

NGSS.MS-PS3-1

Match the time frame with the object's motion descriptions.

• the object slowed down until it stopped

• 10 - 30 s

• the object sped up from a stop

• 0 - 10 s

• maintained a constant speed (not 0)

• 30 - 45 s

Tags

NGSS.MS-PS3-1