Investigation 1 Acceleration

Which car(s) traveled at a constant speed?

• A

• B

• C

• D

Which car(s) accelerated?

• A

• B

• C

• D

Tags

NGSS.MS-PS2-2

Which car(s) had an average speed of 2 m/s?

• A

• B

• C

• D

Which car(s) had the greatest acceleration?

• A

• B

• C

• D

Tags

NGSS.MS-PS2-2

Which car(s) traveled the farthest?

• A

• B

• C

• D

Tags

NGSS.MS-PS3-1

A roller coaster car is traveling 1 m/s at the top of the track. At the bottom of the track, 5 seconds later, it is traveling 36 m/s. What is its average acceleration?

• 7.2 m/s²

• 0.14 m/s²

• 36 m/s²

• 7 m/s²

A group of students were experimenting with how size, mass, and shape affect how fast objects fall.

Two pieces of paper that are the same size and mass are dropped at the same time from the top of the ladder. One is flat and the other crumpled into a ball. Which piece of paper will hit the ground first?

• The crumpled ball of paper will hit the ground first

• The smooth, flat piece of paper will hit the ground first.

• Both pieces of paper will hit the ground at the same time.

• More information is needed to determine which ball will hit the ground first.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

A group of students were experimenting with how size, mass, and shape affect how fast objects fall.

Two pieces of paper that are the same size and mass are dropped at the same time from the top of the ladder. One is flat and the other crumpled into a ball. Why would the crumpled ball hit the ground first?

• The flat paper will fall straight down to Earth because it is so thin and there is nothing to slow it down.

• The crumpled paper will fall faster to Earth since we can throw it, instead of dropping it.

• The flat paper will fall faster because it is thin and there is less air resistance slowing its motion.

• The crumpled paper will fall faster because there is less air resistance from the surface slowing its motion.

Tags

NGSS.MS-PS2-2

Two balls that look exactly the same but have different masses are dropped at the same time from the top of the ladder. Which ball will hit the ground first?

• The ball with more mass will hit the ground first

• The ball with less mass will hit the ground first.

• Both balls will hit the ground at the same time

• More information is needed to determine which ball has more kinetic energy.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Why would two balls with different masses still hit the ground at the same time if dropped from the same position?

• Friction prevents one ball from going faster than the other.

• The still have the same surface area so the same amount of air resistance acts on each.

• The balls should fall at the same rate even if they have different masses because the acceleration of gravity is constant.

• Gravity can only pull objects at 9.8 m/s².