Forces and Law of Gravity Review

What forces are acting on a piece of paper as you drop it to the ground?

• Gravity, which is a contact force.

• Normal force and gravity, which are both contact forces

• Air resistance and tension force, which are both non-contact forces.

• Air resistance, which is a contact force and gravity, which is a non-contact force.

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NGSS.MS-PS2-4

Select all of the forces that are contact forces.

• Air resistance

• Electrical

• Magnetic

• Friction

• Normal Force

Select all forces that are non-contact forces

• Gravitational

• Magnetic

• Applied

• Electrical

• Air Resistance

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Which of the following scenarios demonstrates a non-contact force

• Roller skating across the skating rink

• A saw cutting a piece of wood

• A person opening a door

• A magnet making another magnet move from under the table

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NGSS.MS-PS2-3

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Joy is in the classroom and notices several pencils on the ground. What force acts on the pencils while they are on the ground?

• Friction

• Normal

• Applied

• Magnetic

Tags

NGSS.MS-PS2-4

Which of the following statements describes how gravitational force is affected by mass or distance?

• As mass increases, the gravitational force between two objects increases.

• As mass increases, the gravitational force between two objects decreases.

• As distance increases, the gravitational force between two objects increases.

• As distance decreases, the gravitational force between two objects decreases.

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Which statement correctly explains how gravitational force is related to distance?

• As objects move away from each other, the gravitational force increases.

• As objects move away from each other, the gravitational force decreases.

• As distance remains the same between objects, the gravitational force decreases.

• As distance decreases between objects, the gravitational force decreases.

The objects shown in the following diagrams have different masses and are different distances apart. Which diagram shows the two objects that have the greatest force of gravity acting between them?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-4

What is the primary force that brings a roller coaster down over the first hill?

• gravity

• air resistance

• friction

• normal

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NGSS.MS-PS2-4

What is the primary force that makes your hair stick up when you rub a balloon on something and hold it over your head?

• friction

• magnetism

• electrical

• air resistance

Tags

NGSS.MS-PS2-5