Gravity, Motion and Forces

The boy's brother comes up to the other end of the wagon and pushes it forward.

What happens to the motion of the wagon?

• It will slow down.

• It will stop.

• It will speed up.

• It will move backwards.

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NGSS.MS-PS2-2

The boy's brother comes up to the other end of the wagon and pulls it gently backward. What happens to the motion of the wagon?

• It will speed up.

• It will turn to the side.

• it will slow down.

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

When a person pulls down on the rope, how will the box move.

• The box will move down.

• The box will not move at all.

• The box will move up.

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The main reason a baseball comes down when a boy tosses it up into the air is —

• magnetism is pulling the ball down

• the boy cannot see to catch it

• gravity is pulling down on the ball

• gravity pushes the ball in the air

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How does friction affect the motion of an object?

• Friction causes the object to move faster.

• Friction causes the object to move slower.

• Friction causes the object to not move.

• Friction causes the object to spin.

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NGSS.MS-PS2-2

A push or pull that acts on an object.

• Force
• Gravity
• Friction
• Lubricant

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The change in position of an object.

• Acceleration
• Motion
• Equilibrium
• Unbalanced Force

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NGSS.MS-PS2-2

Forces that are not equal in size and direction.

• balanced forces

• Unbalanced forces

• equal forces

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NGSS.3-PS2-1

A force that resists the movement of one surface past another surface.

• Acceleration

• Gravity

• Friction

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NGSS.MS-PS2-2

The force of attraction that exists between any two objects.

• Friction

• balanced forces

• Magnetism

• Gravity

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