SS Newton's 1st Law and Types of Forces

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

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 the name for a push or pull?

• A movement
• A force
• Speed
• Density

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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 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 

After a cannonball is fired into frictionless space, the amount of force needed to keep it going equals

• twice the force with which it was fired
• the same amount of force with which it was fired
• 1/2 the force with which it was fired
• zero, since no force is requires to keep it moving. 

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What is inertia?

• the force that opposes motion
• the force of attraction between 2 objects
• an object's tendency to stay in motion or to stay at rest
• a change in an object's speed and/or direction

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The force that pulls things toward earth.

• Speed
• Gravity

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

• Jessica's body flies forward after she hits the brakes

• Jessica drives a car

• Jessica is at a road crossing

• Jessica is sleeping

Name the missing force....

• weight force
• normal force
• frictional force
• tension force

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