Quiz 3 REview

What is Sir Isaac Newton's first law of motion?

• For every action, there is an equal and opposite reaction.

• An object at rest remains at rest, and an object in motion remains in motion at the constant speed and in a straight line unless acted on by an unbalanced force.

• Energy can neither be created nor destroyed, only transformed from one form to another.

• The rate of change of momentum of a body is directly proportional to the force applied and occurs in the direction in which the force is applied.

True or False: Whenever one object exerts a force on another object, the second object always exerts an equal force back on the first object.

• True

• False

Fill in the blanks: The two forces of a force pair are called the ​ (a)   force and the ​ (b)   force.

• reaction
• action

A player hits a ball with a bat: The action force is the impact of the bat against the ball. What is the reaction to this force? 

• Air resistance on the ball.

• The weight of the ball.

• The force of the ball against the bat.

• The grip of the player's hand against the ball.

An object at rest is ______________.

• moving

• not moving

A scientist (1643-1727) contributed many things to our scientific understanding of the world. He developed a theory called "gravity" He invented a new kind of mathematics which he called "fluxions," but which today we call calculus. He also discovered the laws of motion, which describe how things move.

• Harry Hess

• Nicolaus Copernicus

• Galileo Galilei

• Sir Isaac Newton

Fill in the blank:  Forces always occur in ______________.

Newtons first law is also known as _________.

• Gravitas

• Inertia

• Gravity

• Force

Newton named his first law of motion using the ancient Greek Latin, inertia. Gravitation comes from the Latin word gravitas, from gravis (heavy), which in turn comes from a still more ancient root word thought to have existed. Which of the following best describes the concept of inertia?

• The velocity of an object in motion

• The tendency of an object to remain in motion

• The tendency of an object to resist any changes in motion.

• The force required to change an object's motion

What is the relationship between mass and inertia? 

• The smaller the mass the larger inertia and The larger the mass the smaller the inertia.

• The smaller the mass the less inertia and the larger the mass the more the inertia.