First Law of Motion

An object at rest will stay at rest unless an unbalanced force acts on it.

• True

• False

If these teams are pulling with the same amount of force what will happen?

• The boy in blue will win.

• They will not move at all.

• The boy in red will win.

• Both will fall down.

Tags

NGSS.MS-PS2-2

An object's tendency to resist (not) change its state of motion is called ____________.

• gravity

• force

• inertia

• friction

While you’re ice-skating with your friends, you push off from one end of the rink and slide forward. Based on Newton’s first law of motion, what is true?

• You will continue to slide until a force makes you stop or change direction.

• The force of gravity will make you keep your velocity.

• You will not go far.

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

Which of the following scenarios is an example of 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 moves it.

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

• A person feels pushed back into their seat when the car they are in accelerates quickly.

What is the tendency of an object to resist a change in motion?

• coffee

• motion

• inertia

• gravity

Tags

NGSS.MS-PS2-1

What is required to change the state of motion of an object with mass, according to Newton's First Law?

• A balanced force.

• An unbalanced force.

• No force is required if the object is already in motion.

• A decrease in mass.

Tags

NGSS.MS-PS2-2

What role does friction play in Newton's First Law of Motion?

• It is the force that keeps objects in motion.

• It acts as an unbalanced force that can change an object's state of motion.

• It increases the net force acting on an object.

• It has no role in Newton's First Law of Motion.

Tags

NGSS.MS-PS2-2

If you push a sled and it starts moving, which law explains why it eventually stops?

• Newton's First Law, because of friction acting as the unbalanced force.

• Newton's Second Law, because the force of friction decreases the acceleration to zero.

• Newton's Third Law, because the reaction force from the ground stops the sled.

• The law of conservation of energy.