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 describes motion in two dimensions?

• a car driving through a city

• a rock dropping off a cliff

• a sprinter on a 100-m track

• a train on a straight track

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

• the blue line

• the black line

• the green line

• the orange line

Tags

NGSS.MS-PS3-1

Which describes the greatest displacement?

• walking 3 m East, then 3 m North, the 3 m West.

• walking 3 m East, then walking 3 m South, then 3 m East

• walking 3 m North, then 3 m South, then 3 m North

• walking 3 m North, then 3 m West, then 3 m 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 hrs

• a truck moving 50 km in 1 hr

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.

Tags

NGSS.MS-PS2-2

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

Tags

NGSS.MS-PS3-1

Which is a unit of acceleration?

• kg/m

• kg x 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 4 km/h

• a dog walking west at 3 km/h and a cat walking west at 3 km/h

• a girl walking wets at 3 km/h and a boy walking south at 3 km/h

Radar tells an air traffic controller that a jet is slowing as it nears the airport. Which might represent the jet's speed?

• 700 h

• 700 h/km

• 700 km

• 700 km/h

Tags

NGSS.MS-PS3-1