Motion

The motion of an object can be described by its

• speed

• direction

• position

• all of these

Tags

NGSS.MS-PS3-1

An object travels a given distance at a speed of 5 m/s. If the object travels the same distance at a higher speed, how will the faster speed affect the time it takes the object to travel the distance?

• The time will not be affected.

• It will take more time to travel the distance.

• The time will remain constant.

• It will take less time to travel the distance.

A car is traveling south at a speed of 63 miles per hour and then begins traveling west but continues traveling at the same speed. Which of the following has changed?

• mass

• velocity

• speed

• gravity

Tags

NGSS.MS-PS2-2

The graph shows how the position of an object changes over time.

Assuming that the motion of the object remains the same, at what position will the object be when it has traveled for a total of 6 s?

• 0 m

• 5 m

• 1 m

• 2 m

Randy is sledding down a hill away from his sister, Leslie, who is standing at the top of the hill. At first, Randy moves at a constant speed down a nearly flat part of the hill. Then, suddenly, the hill becomes much steeper, and Randy almost immediately starts moving at a much faster speed.

Which graph shows Randy's position as he moves away from his sister?

• W

• X

• Y

• Z

Tags

NGSS.MS-PS3-1

A cross-country team leaves school for a training run. They start at the school, run 6 miles north, and then turn around. They end their run in the same place that they started. Which of these describes the displacement of the runners?

• 6 miles

• 0 miles

• 18 miles

• 12 miles

Speed is the rate of change of position expressed as _____ traveled per unit of time.

• displacement

• direction

• meter

• distance

Tags

NGSS.MS-PS3-1

A hungry squirrel can't remember where it buried its acorns. So it leaves its tree and scurries along the path shown below. It digs a hole at every location indicated. When it finally finds its acorns in the third hole, it returns to the tree to eat.

What is the total distance the squirrel travels?

• 6.7 m

• 4.9 m

• 1.8 m

• 0.0 m

What is happening in the graph?

• The object is moving at a constant speed toward its starting point.

• The object is standing still.

• The object's speed is changing.

• The object is moving at a constant speed away from its starting point.

Tags

NGSS.MS-PS3-1

Henry has a pet snail, which he is training for races against other snails. He has the snail run a time trial and measures its position relative to the starting line every minute for 4.0 minutes. His data are collected below.

Time (min) Position (cm)

0.0 0.0

1.0 6.5

2.0 13.0

3.0 19.5

4.0 26.0

Which graph could represent the snail's position from the starting line through time?

• W

• X

• Y

• Z

Tags

NGSS.MS-PS3-1