Finding Speed

Four solid balls, each with a different mass, are moving at the same speed. Which ball would require the most force to stop its motion?

• ball with a mass of 5 kg
• ball with a mass of 10 kg
• ball with a mass of 15 kg
  
• ball with a mass of 20 kg

Tags

NGSS.MS-PS2-2

A girl walked for 30 minutes. She noticed that she traveled farther in the first 15 minutes of her walk than in the second 15 minutes. What can she conclude about her walk?

• She walked over many hills.
• Her average speed was faster during the first half of her walk.
• She walked in two different directions.
• She was walking at a constant speed.

Which best describes the speed of a ball as it is thrown straight up into the air and comes back down?

• The ball goes up at a constant speed, stops, then comes down at a constant
  speed.
• The ball goes up at a constant speed, stops, and increases speed as it comes
  down.
• The ball goes slower and slower as it goes up, stops, and then goes faster
  and faster as it comes down.
• The ball goes slower and slower as it goes up, stops, and then comes down
  at a constant speed.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What can cause a moving object to increase its speed in a forward direction?

• a force pushing on the object from the opposite direction
• a force that continually acts on the object in the direction the object is moving
• an increase in the mass of the object
• a decrease in the mass of the object

Tags

NGSS.MS-PS2-2

A student uses a rubber band to launch the four objects shown in the table.
If the student pulls the rubber band back the same amount each time, which object will most likely move the fastest when launched?

• paper clip
• piece of paper
• eraser
• rubber ball

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

A pencil falls off of a desk. What moves the pencil toward the floor?

• mass
• friction
• gravity
• speed

Tags

NGSS.MS-PS2-4

A child rides a wagon down a hill. Eventually, the wagon comes to a stop. Which is most responsible for causing the wagon to stop?

• gravity acting on the wagon
• friction acting on the wagon
• the mass of the wagon
• the mass of the child

Tags

NGSS.MS-PS2-2

Describe the motion in the graph:

• Constant Speed (positive slope)

• Stopped (at rest)

• Acceleration (increasing speed)

• Return Home (negative slope)

Tags

NGSS.MS-PS3-1

How long did it take this object to travel 10 m?

• 0 s
• 10 s
• 15 s
• 20 s

Match the description to the graph:

"The car is coming back."

• 
• 
• 
• 

Tags

NGSS.MS-PS2-2