Force and Inertia

The tendency of an object to resist a change in its state of motion is called the object's ______.

• incline
• straight line
• friction 
• inertia 

Without a force to stop or slow a coasting object, the object will coast forever in a ______ line. 

• blue
• red
• straight
• vertical 

Objects at rest remain at rest and objects traveling at a steady rate in a straight line continue that way until a _________acts on them.  

• force
• velocity
• inertia
• acceleration 

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An object in motion will stay in what kind of motion as long as the net forces acting on it are zero?

• slowing motion in a straight line
• accelerating motion in a straight line
• constant motion in a straight line
• constant motion in an unpredictable direction

friction is a force that acts 

• in the same direction as the motion
• opposite to the direction of the motion
• opposite to the applied forces
• the same direction as the applied force

What kind(s) of objects have inertia?

• all objects with mass
• only objects at rest
• only objects in motion
• only objects whose motion is being changed

What is Newton's First Law

• F=ma
• Every action has an equal and opposite reaction
• An object at rest stays at rest, an object in motion stays in motion. 
• Friction 

Describe what will happen to the truck in this picture

• Accelerate

• Decelerate

• Constant speed

• Stationary

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If an object is stationary, it means

• the object is in motion

• the object is experiencing air resistance

• there are balanced forces acting on the object

• there are unbalanced forces acting on the object

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Which statement explains why you are thrown forward when the car you are riding in suddenly stops?

• You are pushed forward by the force of the car stopping

• The force of the crash accelerates you forward

• You are are in motion as the car is driving, and when it stops, your body continues to be in motion

• The car stopping must balance out by having you move forward

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