Physical Science, Chapter 11, Motion, Post Assessment

Examine Figure 11-1, if you were standing under the tree which object would appear to be moving?

• the tree
• the boy
• the airplane
• the building

A passenger in the rear seat of a car moving at a steady speed is at rest relative to 

• the side of the road
• the front seat of the car
• a pedestrian on the corner ahead
• the wheels of the car

Which distance can be most accurately measured with a ruler?

• the length of a river
• the distance between two cities
• the width of a book
• the size of an object under a microscope

One kilometer equals 1000 meters. What does the prefix kilo- mean?

• 1
• 10
• 100
• 1000

A person walks 1 mile every day for exercise, leaving her front porch at 9:00 AM and returning to her front porch at 9:25 AM.  What is the total displacement of her daily walk?

• 1 mile
• 25 minutes
• 0
• none of the above

A person drives north 3 blocks, then turns east and drives 3 blocks.  The driver then turns south and drives 3 blocks.  How could the driver have made the distance shorter while maintaining the same displacement?

• by driving east 3 blocks from the starting point
• by driving north 1 block and east 4 blocks
• by driving west 3 blocks from the starting point
• by driving back to the starting point by the same route.

What is the most appropriate SI Unit to express the speed of a cyclist in the last leg of a 10-km race?

• km/s
• km/h
• m/s
• cm/h

Speed is the ratio of the distance an object moves to 

• the amount of time needed to travel the distance.
• the direction the object moves
• the displacement of the object
• the motion of the object

Tags

NGSS.MS-PS3-1

Instantaneous speed is measures

• at the starting point
• at a particular instant
• when the object reaches its destination
• over the duration of the trip

A car traveled 88 km in 1 hour, 90 km in 2 hours and then 76 km in 1 hour before reaching its destination.  What was the car's average speed?

• 254 km/h
• 209 km/h
• 63.5 km/h
• 74.5 km/h