3.1 Newton's 2nd Law Calculations

What is the formula for calculating Force?

• F=ma

• a=F/m

• m=Fa

• F=m/a

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NGSS.MS-PS2-2

What is the formula for calculating acceleration?

• a=F/m

• F=ma

• a=Fm

• F=m/a

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NGSS.HS-PS2-1

How much force is needed to accelerate a 3kg skateboard at 5m/s²?

• 8N
• 1.6N
• 0.6N
• 15N

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NGSS.MS-PS2-2

If a 10 kilogram object accelerates suddenly at 15 m/s^2, how much force was applied to the object?

• 150 Newtons
• 15 Newtons
• 150 kilograms
• 100 kilograms

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NGSS.MS-PS2-2

What two variables define force?

• speed and velocity

• mass and acceleration

• mass and velocity

• distance and time

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NGSS.MS-PS2-2

For this question, refer to the image to the left...

The larger the ___________ of an object, the greater the ____________ needed to change the direction or the speed.

• mass / tow truck

• suitcases / force

• mass / force

• windows / force

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NGSS.MS-PS2-2

You pull a wagon with your younger sister in it. Which of these would accelerate the rate at which you can pull the wagon?

• pull the wagon with less force
• Pull the wagon with more force
• Have your sister push down on the wagon
• Put another of your siblings in the wagon

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NGSS.MS-PS2-2

If the man pushes with an equal amount of force, which object will accelerate more?

• Car because it has more mass

• Lawnmower because it has less mass

• Car because it has less mass

• Lawnmower because it has more mass

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NGSS.MS-PS2-2

According to Newton's second law of motion, if a rigid body of unchanging mass is observed accelerating, what must be happening?

• A force was once applied but is now not being applied.

• The mass must be changing.

• Unbalanced forces act "all crazy!!!" on an object.

• A force is being applied to the mass.

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NGSS.MS-PS2-2

What is the relationship between a change in object’s acceleration and a change in its mass?

• They are directly proportional
• They are inversely proportional
• Acceleration doesn't depend on mass at all.

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NGSS.HS-PS2-1