Describing Motion

An airplane rolls down the runway. Compared to which reference point is the airplane in motion?

• the cargo the plane carries
• the control tower
• the pilot flying the plane
• the plane's wing

Which is defined as the process of changing position?

• displacement
• distance
• motion
• relativity

In the phrase "two miles southeast of the mall", what is the mall?

• a dimension
• a final destination
• a position
• a reference point

Which line represents the greatest average speed during a 30s time period?

• the blue line
• the black line
• the green line
• the orange line

Which describes the greatest displacement?

• walking 3m east, then 3m north, then 3m west
• walking 3m east, then 3m south, then 3m east
• walking 3m north, then 3m south, then 3m north
• walking 3m north, then 3m west, then 3m south

Which has the greatest average speed?

• a boat sailing 80 km in 2 hours
• a car driving 90 km in 3 hours
• a train traveling 120 km in 3 hours
• a truck traveling 50 km in 1 hour

Which describes motion in which the person or object is accelerating?

• A bird flies straight from a tree to the ground without changing speed.
• A dog walks at a constant speed along a straight sidewalk.
• A girl runs along a straight path the same distance each second.
• A truck moves around a curve without changing speed.

Richard walks from his home to his school at a constant speed. It takes him 4 min to travel 100 m. Which of the lines in the following distance-time graph could show Richard's motion on the way to school?

• the black line
• the blue line
• the green line
• the orange line

Which is a unit of acceleration?

• kg/m
• kg*m/s²
• m/s
• m/s²

Which have the same velocity?

• a boy walking east at 2 km/h and a man walking east at 4 km/h
• a car standing still and a truck driving in a circle at 4km/h
• a dog walking west at 3 km/h and a cat walking west at 3 km/h
• a girl walking west at 3 km/h and a boy walking south at 3 km/h