What is Newton's First Law of Motion also known as?

• Law of Inertia

• Law of Gravity

• Law of Action and Reaction

• Law of Acceleration

According to Newton's First Law, what happens to an object at rest?

• It changes direction

• It starts moving on its own

• It stays at rest unless acted upon by an unbalanced force

• It accelerates

Why doesn't a heavy box move when you push it with a force equal to the friction force?

• Because the forces are balanced

• Because the ground is too rough

• Because the box is broken

• Because the box is too heavy

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NGSS.MS-PS2-2

What happens to the box when the applied force exceeds the friction force?

• It remains at rest

• It disappears

• It starts to move

• It changes direction

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NGSS.MS-PS2-2

What causes the ball to eventually stop rolling on the flat part of the hill?

• Gravity

• The ball's weight

• Friction from the grass

• Wind resistance

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NGSS.MS-PS2-2

What is the role of friction in the motion of the ball?

• It changes the ball's color

• It has no effect

• It opposes the direction of motion

• It speeds up the ball

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In the Phet game, what happens when you apply a force to a box on a surface with no friction?

• The box stays at rest

• The box moves at a constant speed

• The box accelerates

• The box moves in circles

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NGSS.MS-PS2-2

What is required to overcome the inertia of a heavy object at rest?

• An unbalanced force

• A balanced force

• A small force

• No force

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What happens to the box when the applied force is removed on a frictionless surface?

• It stops immediately

• It continues to move at a constant speed

• It accelerates

• It moves in the opposite direction

How does increasing friction affect the motion of the box in the Phet game?

• It makes the box change direction

• It makes the box move slower

• It has no effect

• It makes the box move faster

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NGSS.MS-PS2-2