Energy Changes in Collisions

Jami tossed a tennis ball straight up in the air and gets ready to catch it as it comes back down. What changes during the time the ball was in the air?

• the ball's color

• the ball's size

• the ball's position

These two cars are released at the same time. Which statement best describes what happens to the cars as they leave the bottom of the ramp?

• They speed up.

• They start spinning.

• They change direction.

• They speed up.

Two students are rolling a toy car back and forth across the sidewalk. Suddenly, the car changes direction. When the students explore why this happened, they see that the car hit a rock. Which of these caused the car to change direction?

• A change in gravity.

• . A change in volume.

• A change in mass.

• A change in force.

A force is any push or pull from one object to another.

• True

• False

Tags

NGSS.MS-PS2-1

What is energy?

• moving energy

• a force

• a generator

• the ability to do work

In science, when one object runs into another we call it a _____________.

• crash

• hit

• strike

• collision

As an object moves faster, it has more of what to transfer?

• weight

• density

• energy

• matter

A push or pull that causes and object to move, stop, or change direction is called a __________.

• motion

• force

• contact

• energy