PS Review CH 11,14,16

Using the diagram, if you were standing under the tree, which object would appear to moving?

• the tree

• the boy

• the airplane

• the building

One kilometer equals 100 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. What is the total displacement of her daily walk?

• 1 mile

• 0

• 25 minutes

• not enough information to determine displacement

A ball is rolled uphill a distance of 3 meters before it slows, stops, and begins to roll back. The ball rolls downhill 6 meters before coming to rest against a tree. What is the magnitude of the ball's displacement?

• 3 meters

• 6 meters

• 9 meters

• 18 meters

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

Instantaneous speed is measured ___________.

• at the starting point

• when the object reaches its destination

• at a particular instant

• over the duration of the trip

The slope of a line on a distance-time graph is

• distance

• time

• speed

• displacement

What is the speed of a bobsled whose distance-time graph indicates that it traveled 100m in 25 s?

• 4 m/s

• 250 m/s

• 0.25 mph

• 100 m/s

A river current has a velocity of 5 km/h relative to the shore, and a boat moves in the same direction as the current at 5 km/h relative to the river. How can the velocity of the boat relative to the shore be calculated?

• by subtracting the river current vector from the boat's velocity vector

• by dividing the river current vector by the boat's velocity vector

• by multiplying the vectors

• by addingthe vectors

The rate at which velocty changes is called _________.

• speed

• vectors

• acceleration

• motion