Newton's Laws of Motion

The property of a object at rest to remain at rest is known as

• inertness

• inertia

• resistance

• sluggishness

If an object moves with a constant velocity, we can conclude that

• it is moving toward its natural place.

• there are no forces acting on it.

• there is no unbalanced (net) force acting on it.

• it has a very large inertia.

What is the net force on an 800-kg airplane flying with a constant velocity of 160 km/hour north?

• zero

• 160 N

• 800 N

• 128 000 N

If you push on a railroad boxcar with a force of 200 N and it doesn't move, you can conclude that

• There is a force of 200 N in the opposite direction.

• Newton's second law is not valid.

• This force is canceled by the third law force.

• The boxcar has too much mass to accelerate.

For every action there is an equal but opposite reaction refers to

• Newton's Third Law of Motion

• The Law of Conservation of Momentum

• Newton's Second Law of Motion

• Acceleration

The force that slows things down is

• friction

• inertia

• gravity

• centripetal force

You're riding a bike when suddenly you hit a large rock. The bike stops moving but you fly over the handlebars. This is an example of ....

• Newton's First Law of Motion

• Newton's Third Law of Motion

• Law of Conservation of Momentum

• Newton's Second Law of Motion

What is the Formula for Force in terms of acceleration?

• F=mv

• F=ma

• a=Fm

• m=Fa

The same net force is applied to object A and object B. The observed accelerations of the two objects are not the same; object A has an acceleration three times that of object B. Which of the following is correct?

• Object A has three times the mass of object B

• Object A has a different, less streamlined shape than object B.

• Object A has one-third the mass of object B.

• Object A has more friction than object B

What is the mass of a cart that has an acceleration of 5 m/s/s when a net force of 2000 N is applied to it?

• 10,000 kg

• 2000 kg

• 1000 kg

• 400 kg