Forces and Newton's First Law

An object at rest will _______ if no outside forces are applied.

• Stay at rest

• Increase Velocity

• Decrease Mass

Tags

NGSS.HS-PS2-1

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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NGSS.MS-PS2-2

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 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 

Which of the following scenarios best illustrates Newton's First Law of Motion?

• A ball rolling down a hill speeds up.

• A book lying on a table remains at rest until someone picks it up.

• A car comes to a stop when the brakes are applied.

• A rocket launches off the ground when its engines fire.

An object in motion (or at rest) will to stay in motion (or at rest) until an outside force acts upon it.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Newton's 4th Law

If a car is moving at a constant speed on a straight road, what can be said about the forces acting on it?

• The forces are balanced

• The forces are unbalanced

• There are no forces acting on the car

• Only gravitational force is acting on the car

According to Newton's First Law, an object at rest will stay at rest unless acted upon by a:

• Balanced force

• Unbalanced force

• Gravitational force

• Magnetic force

What is the net force on an object if the forces acting on it are balanced?

• Zero

• Equal to the weight of the object

• Equal to the gravitational force

• Equal to the frictional force

What happens to an object when the forces acting on it are unbalanced?

• It remains at rest

• It moves at a constant speed

• It changes its state of motion

• It becomes weightless

Tags

NGSS.MS-PS2-2