Force and Motion 5.7A Review

Which statement describes how position and work are related in this picture? Illustration of two students on a swing set: Student 1 is swinging with legs extended, Student 2 is sitting still with feet on the ground.

• Both students are doing work even if only one student is changing position.

• Student 1 is changing position because work is being done on the swing.

• Work done by Earth’s gravity prevents Student 2 from changing position.

• Work is being done on both students by the swings because one swing is changing position.

Which of these should a person do to lift the box using the pulley system shown in the picture?

• Tie the end of the rope to the box

• Tie the end of the rope to the ceiling hook

• Pull the end of the rope downward

• Allow the end of the rope to move upward

When two people pull on a rope with equal force in opposite directions, what is this situation called?

• unbalanced rope

• balanced rope

• moving rope

• twisted rope

If one side pulls harder than the other in a tug-of-war, what type of force is acting on the rope?

• balanced force

• unbalanced force

• equal force

• static force

Why does the rope not move when both sides pull with 10 N of force in opposite directions?

• The forces are balanced, so there is no movement.

• The rope is too heavy.

• The rope is stuck to the ground.

• The people are not strong enough.

What should the students do to change the amount of friction that slows the motion of the balloon rocket?

• Try different color balloons.

• Use a different type of tape.

• Replace the string with thin wire.

• Hold the string ends closer together.

Why is the depth of the dent different in each trial?

• The size of the ball changes.

• The material of the ball changes.

• The mass of the ball when it hits the clay changes.

• The force of the ball when it hits the clay changes.

Which statement below is correct? Table showing a list of activities and columns to determine if each is a push or pull force: Kicking a soccer ball across the playground, Dropping a ball from a balcony, Pressing on a table with your hands, Lifting a heavy box off the floor, Rolling a bowling ball down the bowling alley.

• One activity is a push and four are a pull

• Two activities are push and three are pull

• Three activities are push and two are pull

• Four activities are push and one is pull

Why does kicking the ball to the right make it go right?

• Because the force applied by the kick causes the ball to move in the direction of the force

• Because the ball has a natural tendency to move to the right

• Because the ball is attracted to the right side of the field

• Because the ball is repelled by the left side of the field

Tags

Evaluating reasons and evidence

How do soccer players use forces in relation to the ball?

• To stop the ball from moving

• To change the color of the ball

• To start the ball moving and change its speed and direction

• To make the ball disappear

Tags

Comprehending a text