What happens to an object when the forces acting on it are balanced?

• It speeds up.

• It stays still.

• It starts moving.

• It changes direction.

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NGSS.MS-PS2-2

If a car is not moving, what can we say about the forces acting on it?

• The car is decelerating.

• The car is accelerating.

• The forces are balanced.

• The forces are unbalanced.

What happens to an object in motion if the net force is zero?

• It stops moving.

• It speeds up.

• It changes direction.

• It continues moving at the same speed.

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NGSS.HS-PS2-1

NGSS.HS-PS2-2

When a ball is kicked, what causes it to move?

• Gravity.

• Friction.

• Unbalanced forces.

• Balanced forces.

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NGSS.MS-PS2-2

How do you calculate the speed of a moving object?

• Add distance and time.

• Subtract time from distance.

• Divide distance by time.

• Multiply distance by time.

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NGSS.MS-PS3-1