Net Force and Newton's Laws

What law of motion does this picture represent?

• Newtons 1st law

• Newtons 4th law 

• Newtons 3rd law 

• Newtons 2nd law

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What is Newtons 2nd law of motion?

• Pancakes 

• Force= Mass multiplied by acceleration

• For every action there is a equal and opposite  re-action.

• Law of gravity 

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Which is the best example of Newton's First Law of Motion?

• a basketball thrown in the air falls to the ground

• a soccer ball remains motionless until it is kicked by a player

• a baseball player swings at an approaching ball

• an ice skater pushes back from a wall and moves backwards

If you double the mass of an object with the same force apply on it, the acceleration will

• double

• cut in half

• the same

• zero

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Which one needs a greater net force to move, a kilogram of feathers or a kilogram of iron? 

• feathers 

• iron

• same

• depends on their friction

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A book weighs 4 N. When held at rest in your hands, the net force on the book is
 

• 0 N.

•  0.4 N.

•  4 N.

•  39 N.

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A 20 kg bike accelerates at 10 m/s².  what was the net force

• 25 Newtons

• 20 Newtons

• 200 Newtons

• 10 Newtons

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When a cannon fires a cannonball we observe Newton's third law. Which force is the reaction force?

• The cannon moving forward

• The cannonball moving forward

• The cannon moving backward

• The cannonball moving backward

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Which of the following shows the direction of the friction force?

• A

• B

• C

• D

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If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration?  (F=ma)

• The one with a mass of .78 kg will have the greatest acceleration.

• The one with a mass of .52 kg will have the greatest acceleration.

• They will both accelerate at the same rate.

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