Transfer of Energy in Collision and Energy and Speed

Students are using toy cars to investigate changes in energy. Which of the following observations shows that the energy of the cars is changed when they hit each other?

• After hitting each other, the cars move more slowly.

• Before hitting each other, the cars move in a straight line.

• After hitting each other, the cars are the same color.

• When the cars hit each other, they remain motionless.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

When two cars collide, which of the following is NOT evidence that energy has been transferred?

• A sound is produced.

• The cars changed direction.

• The cars are the same size.

• The cars changed speed.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

We observe a moving object. When we observe the object moving more slowly, we know that it--

• will move in a new direction.

• has more gravity pulling on it.

• can't go back to where it started.

• has less energy than it had before.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Four identical balls are rolled from the same position at the same time. The illustration shows each ball's starting position and ending position after rolling for two seconds. Which ball had the most energy?

• Ball 1

• Ball 2

• Ball 3

• Ball 4

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Two of the balls roll across the floor toward each other. After they collide, what about the balls is most likely to change?

• their mass

• their size

• their motion

• their shape

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A moving object will have more energy when the object--

• moves faster.

• stops moving.

• changes direction.

• loses mass.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Tommy and his dad went to a baseball game. Tommy noticed that when the batter swung the bat very fast and the ball collided with the bat, the ball flew through the air to the outfield. When the batter barely tapped the ball with the bat, the ball fell to the ground.

Write a scientific explanation (CLAIM + EVIDENCE) to describe how energy transfer caused one baseball to travel farther than other baseball.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5