Motion

Motions need an unbalanced net force to maintain 

• True
• False

What is Newton's First Law known as? The Law of

• Friction
• Mass
• Inertia
• Gravity

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 is the name for a push or pull?

• A movement
• A force
• Speed
• Density

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 

An object following a straight-line path at a constant speed 

• has zero acceleration
• has no forces acting on it
• has a net force acting in the direction of motion
• none of these

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

The force of ____ exists between any two objects that have mass.

• gravity
• acceleration
• weight
• free fall

An object acted upon by a net force will accelerate in the direction of the force according to the equation acceleration = net force/mass.  Which law is this?

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Newton's 4th Law