Unit 1 Exam: Forces and Newton's Laws of Motion

For a force on an object, there is an equal and opposite force.

• Newton’s First Law of Motion

• Newton’s Second Law of Motion

• Newton’s Third Law of Motion

• Newton's Fourth Law of Motion

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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.

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

• A force is being applied to the mass.

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According to Newton's First Law, unless acted upon by an unbalanced force, an object at rest will ______________________________.

• float into outer space

• stay at rest

• get mold on it

• miss the bus

Why is it harder for Iditarod race dogs to pull a sled filled with a winter's worth of supplies than it is for them to pull an empty sled?

• Because Iditarod dogs go on strike when they have to work harder

• The mass of the sled full of winter supplies is greater than the mass of the empty sled

• The sled full of winter supplies is actually easier to pull

• It should be equally as hard to pull the sled full of winter supplies as it is to pull the empty sled

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You pull a wagon with your Great Dane named 'Baby' in it. How could you accelerate the rate at which you can pull the wagon?

• pull the wagon with less force

• Pull the wagon with more force

• Have Baby gain weight

• Put a bag of Baby's dog food in the wagon

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Your Siberian Tiger, Tiny, is pulling on his play rope that is tied to a tree... Tiny is pulling with a force of 300 N to the East and the rope and tree exert a force of 300 N to the West. What is true about the motion of Tiny?

• he isn't moving

• he is accelerating

• he is slowing down

• his speed is constant

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An animal crate with a male White Rhino inside has a total mass of 2000 kg and is pushed with a horizontal acceleration of 5 m/s². What is the net force that is acting on the crate?

• 400 N

• 1000 N

• 10,000 N

• 1995 N

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When forces are balanced, ________________________________ .

• frogs levitate in the air

• the object does not move

• there is peace throughout the galaxy

• Jedi knights are no longer needed

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A(n) ________ is a push or a pull that causes an object to undergo a change in speed, a change in direction, or a change in both.

• magical spell

• resistance

• power

• force

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List the three (3) possibilities that an object might demonstrate when subjected to an unbalanced force:

(You must choose 3 answers)

• Speed Up

• Leave Our Atmosphere

• Slow Down

• Levitate In The Air

• Change Direction

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