Applications of Newton's Second Law

What happens when unbalanced forces act on an object at rest?

• the object remains at rest
• the object begins moving in an unpredictable direction
• the object begins moving in the direction of the net force
• the object begins moving opposite to the direction of net force

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the net force?

• 40 N left
• 0 N Balalnced
• 400 N right
• 40 N right

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

20 N is the

• mass
• weight
• force
• acceleration 

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NGSS.MS-PS2-4

45 m/s² is the... 

• Mass
• Force 
• Acceleration
• weight

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NGSS.MS-PS2-2

What is a Balanced Force?  Two objects where...

• They both have equal force 
• One has more force than the other
• Both have no force
• One has more gravity than the other

Football A has a greater mass than football B. Which football will have greater acceleration when both are thrown with the same force in the same direction?

• Football A

• Football B

• They will have the same acceleration

• Mass has no effect on acceleration

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NGSS.MS-PS2-2

Will it take more force to push an empty shopping cart or a shopping cart that is full?

• The empty shopping cart
• The full shopping cart
• They will take the same amount of force

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

How much force is needed to accelerate a 2 kg physics book to an acceleration of 6 m/s/s?

• 36 N
• 12 N
• 3 N
• 0.33 N

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NGSS.MS-PS2-2

When force is 20 N, mass is 5 kg, what is acceleration?

• 25 m/s/s

• 5 m/s/s

• 100 m/s/s

• 4 m/s/s

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NGSS.MS-PS2-2

What is the acceleration of an object traveling at a constant velocity?

• 10 m/s²
• 0 m/s²
• 250 m/s²
• 20 m/s²