Review: Newton's First Law (Balanced & Unbalanced Forces)

What is the definition of balanced forces?

• Forces that are equal in magnitude and opposite in direction

• Forces that are equal in magnitude and different in direction

• Forces that are unequal in magnitude and opposite in direction

• Forces that are equal in magnitude and same in direction

What is the definition of unbalanced forces?

• Forces that are equal in magnitude and opposite in direction.

• Forces that are not equal in magnitude and opposite in direction.

• Forces that are equal in magnitude and same in direction.

• Forces that are not equal in magnitude and same in direction.

Tags

NGSS.3-PS2-1

Give an example of balanced forces in everyday life.

• Pushing a stationary object with the same force from opposite directions.

• Pushing a stationary object with a greater force from one direction.

• Pushing a stationary object with different forces from opposite directions.

• Pushing a stationary object with a smaller force from one direction.

Give an example of unbalanced forces in everyday life.

• Pulling a door closed

• Walking on a flat surface

• Sitting on a chair

• Pushing a door open

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NGSS.MS-PS2-2

How do you calculate the net force when forces are acting in the same direction?

• Add the magnitudes of the individual forces together.

• Divide the magnitudes of the individual forces by each other.

• Multiply the magnitudes of the individual forces together.

• Subtract the magnitudes of the individual forces.

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NGSS.MS-PS2-2

How do you calculate the net force when forces are acting in opposite directions?

• Divide the smaller force by the larger force.

• Add the smaller force to the larger force.

• Subtract the smaller force from the larger force.

• Multiply the smaller force by the larger force.

Tags

NGSS.MS-PS2-2

What is Newton's first law of motion?

• An object at rest will stay at rest, and an object in motion will stop, unless acted upon by an external force.

• An object at rest will stay at rest, and an object in motion will stay in motion with the same speed and direction, unless acted upon by an external force.

• An object at rest will stay at rest, and an object in motion will stay in motion with a different speed and direction, unless acted upon by an external force.

• An object at rest will stay at rest, and an object in motion will change its speed and direction, unless acted upon by an external force.

According to Newton's first law of motion, what happens to an object when the net force acting on it is zero?

• The object accelerates in the opposite direction of the net force.

• The object comes to a stop immediately.

• The object remains at rest or continues to move with a constant velocity in a straight line.

• The object changes direction but maintains the same speed.

Tags

NGSS.MS-PS2-2

What is another name for Newton's first law of motion?

• law of inertia

• law of acceleration

• law of motion

• law of gravity

True or False: An object at rest will remain at rest unless acted upon by an unbalanced force.

• True

• An object at rest will only move if pushed by a person

• An object at rest will move on its own

• False

Tags

NGSS.MS-PS2-2