Newton's Second Law of Motion

If an object’s mass is increased while the net force acting on it remains constant, what happens to the object’s acceleration?

• The acceleration increases.

• The acceleration decreases.

• The acceleration remains the same.

• The acceleration remains the same.

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NGSS.MS-PS2-2

A 20 kg object is subjected to a 60 N net force. What is the object’s acceleration?

• 1 m/s²

• 2 m/s²

• 3 m/s²

• 4 m/s²

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NGSS.MS-PS2-2

Why does a heavier object (greater mass) require more force to accelerate at the same rate as a lighter object?

• A. Because heavier objects are less affected by gravity.

• B. Because mass and force are inversely related.

• C. Because mass resists changes in motion due to inertia.

• D. Because acceleration is directly proportional to mass.

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NGSS.MS-PS2-2

The diagram below shows two different forces acting on a box being pushed across a floor. The total mass of the box is 10.0 kg. Based on this information, what is the acceleration of the box?

• 3.0m/s² to the left, because the force of friction slows the box down.

• 3.0m/s² to the right, because the applied force is greater than the force of friction.

• 5.0m/s² to the left, because the forces are opposite and not equal.

• 7.0m/s² to the right, because the applied force is much stronger than the force of friction.

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NGSS.MS-PS2-2

Four students measured the forces acting on different objects. The mass and the acceleration of each object are recorded in the table below. Which object experienced the greatest applied force?

• A. 1

• B. 2

• C. 3

• D. 4

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NGSS.MS-PS2-2

Which scenario results in the greatest acceleration of the object?

• Scenario A results in the greatest acceleration because it has more forces from both directions acting on the object.

• Scenario B results in the greatest acceleration because it has a larger mass.

• Scenario C results in the greatest acceleration because it has the greatest net force acting on it.

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Newton's 2nd Law of motion states: Acceleration is directly proportional to force AND acceleration is inversely proportional to mass.

Which of the following is another way to explain Newton's 2nd Law? Select ALL that apply.

• More mass results in a decrease in acceleration with constant force

• More mass results in an increase in acceleration with constant force

• With more force exerted, acceleration will increase if mass is constant

• With less force exerted, acceleration will decrease if mass is constant

• If you increase mass, you will need to increase force to maintain acceleration

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NGSS.MS-PS2-2

Which scenario best illustrates Newton’s second law of motion?

• A. a book resting on a table

• B. a car slowing down due to friction

• C. a balloon releasing air and flying around the room

• D. a person pushing a shopping cart with increasing force, causing it to speed up

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NGSS.MS-PS2-2

If an object’s mass is increased while the net force acting on it remains constant, what happens to the object’s acceleration?

• The acceleration increases.

• The acceleration decreases.

• The acceleration remains the same.

• The acceleration remains the same.

Tags

NGSS.MS-PS2-2

You apply the same force to two objects. The more massive object will accelerate ​ (a)   the smaller object.

• less than
• more than
• the same as

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NGSS.MS-PS2-2