PTMS Motion Warm Up 2/13/2023

Select ALL that apply to acceleration.

• speeding up​

• moving in a straight line and at a constant speed​

• changing direction

• slowing down

Juan and Antonio are racing to school. Analyze the graph, and select ALL of the statements that are true.

• Juan arrived to school first, because his time was 13 min.

• Antonio arrived to school first, because his time was 15 min.

• They both walked the same distance, and arrived at the same time.

• They both walked 4 miles.

Answer explanation

They both walked 4 miles.

Juan arrived first, because he walked faster and his total time was 13 min.

Antonio was slower; his total time was 15 min.

Tags

NGSS.MS-PS3-1

Wesley runs 51 meters (m) in 14 seconds (s). What is his speed?

• 36 m/s

• 0.27 m/s

• 714 m/s

• 3.6 m/s

Answer explanation

speed = distance / time

s = 51 m/14 s = 3.6 m/s

Tags

NGSS.MS-PS3-1

Based on the graph, calculate Juan's speed.

• 52 mi-min

• 3.25 min/mi

• 0.31 mi/min

Answer explanation

speed = distance / time

s = 4 mi/13 min = 0.31 mi/min

Tags

NGSS.MS-PS3-1

Which answer could represent velocity?

• 47 km/hr

• accelerating to 20 m/s

• 20 m/s North

• 45 m/s

Tags

NGSS.MS-PS3-1

What is the graph showing?

• Acceleration

• Constant Speed

• Stopped

Tags

NGSS.MS-PS3-1

What is this graph showing?

• Constant Speed

• At rest (Stopped)

• Accelerating

Answer explanation

The distance is not changing, only the time. If the object were in motion, the distance would change. Therefore the object is NOT moving.

Match the distance-time graph to the correct description.

• Accelerating

• 
• Constant Speed

• 
• At rest

• 

Tags

NGSS.MS-PS3-1

Match the following terms to the correct definition.

• acceleration

• a change in velocity over time

• velocity

• a change in position over time

• speed

• a change in position over time in a particular direction

A runner travels 100 meters (m) in 5 seconds (s). What is his average speed?

• 50 m/s

• 500 m/s

• 20 m/s

• 0.05 m/s

Answer explanation

speed = distance / time

s = 100 m / 5 s = 20 m/s