Two cars start at the same point and drive in a straight line for 5 km. At the end of the drive their distances are the same but their displacements are different. Explain.

• The cars traveled in opposite directions and returned to the starting point.

• The cars traveled in the same direction but one took a longer route.

• The cars traveled in opposite directions and ended at different points.

• The cars traveled in a circular path and ended at the starting point.

The slope of a position-time graph of an object gives the speed of the object.

• True

• False

Tags

NGSS.MS-PS3-1

The position-time graph of an object moving with a constant average velocity is always a straight line.

• True

• False

The y-intercept of a position-time graph of an object gives the average velocity of the object.

• True

• False

Acceleration can never be negative. True or False.

• True

• False

Tags

NGSS.HS-PS2-1

Acceleration is defined as the rate of change of position. True or False.

• True

• False

The momentum of a 5000-kg truck that is standing still is greater than the momentum of a 3,000-kg truck that is also at rest. True or False.

• True

• False

Tags

NGSS.HS-PS2-2

Jane is on a merry-go-round that is moving at a constant speed. Her velocity is also constant. True or False.

• True

• False

Construct a distance-time graph that shows the forward progress of Sunny The Dog in a straight line for 20 m over the course of 4 s.

• a

• b

• c

• d

If you ride your bicycle down a straight road for 800 m then turn around and ride back, your distance is ____m.