Force and Motion

Front

Juan is throwing a ball in the air. Which picture shows the ball that will take the longest to hit the ground?

Back

Front

Two matchbox cars are rolling toward each other. Car A was pushed with more force than Car B. What will most likely happen when the cars hit each other?

Back

Car A will stop, Car B will change direction.

Front

Two friends, Sara and Ben, want to play on the seesaw. Each friend weighs the same amount. What will most likely happen when they get on the seesaw?

Back

Sara and Ben won't move because the forces are balanced.

Front

What will most likely happen when Ms. Heimerich's class of 28 students tugs on the rope against her?

Back

The students will win because they are 28 people pulling on the rope causing the force to be unbalanced.

Front

Scenario that models a balanced force:

A book sliding down a ramp

,

A book sitting on a desk

,

Pushing a book off a desk

,

Carrying a book across the room

Back

A book sitting on a desk

Front

Which picture shows an unbalanced force?

Back

Picture D, because the girl kicking the soccer ball shows an unbalanced force.

Front

Which situation BEST demonstrates a balanced force?

• Student 1 sets up a ramp with a book and rolls a marble down a book.
• Student 2 pushes a marble along a smooth surface, and the marble rolls along the surface.
• Student 3 blows a marble with a straw, but the marble does not move.
• Student 4 pushes a marble across carpet, and the marble slowly moves along the surface.

Back

Student 3 blows a marble with a straw, but the marble does not move.

Front

Which investigations demonstrate balanced and unbalanced forces?

Back

Investigations 1 and 3 demonstrate balanced forces since there was no movement, whereas investigations 2 and 4 demonstrate unbalanced forces since students caused the objects to move.

Front

How does friction affect the motion of a ball rolling on different surfaces after rolling down a ramp?

Back

The ball rolling on the tile shows an unbalanced force since there was less friction than when the ball rolled on the carpet.

Front

What evidence could Marissa use to support the claim that gravitational force affects the motion of an object?

Back

The roots grow downward because they are affected by the force of gravity.