Newton's Laws: The Fundamentals of Motion

What does Newton's First Law of Motion state?

• An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

• The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

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

• Force equals mass times acceleration.

What does Newton's First Law of Motion state?

• An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

• The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

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

• Force equals mass times acceleration.

Which of the following best describes inertia?

• The tendency of an object to resist changes in its velocity.

• The rate of change of momentum of an object.

• The force required to keep an object moving in a circle.

• The force that two surfaces exert on each other when they rub against each other.

According to Newton's Second Law of Motion, what is the formula for force?

• F = m/a

• F = a/m

• F = ma

• F = am^2

What does Newton's Third Law of Motion imply?

• Gravity is the force that pulls objects toward each other.

• Time slows down as you approach the speed of light.

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

• Energy cannot be created or destroyed.

If you push against a wall, the wall pushes back with an equal and opposite force. This is an example of which law?

• First Law of Motion

• Second Law of Motion

• Third Law of Motion

• Law of Universal Gravitation

What happens to the acceleration of an object if the net force acting on it is doubled?

• It is halved.

• It stays the same.

• It is doubled.

• It is quadrupled.

Which of the following is a unit of force?

• Joule

• Newton

• Watt

• Kilogram

What is the effect of an unbalanced force on an object?

• It will change the object's shape.

• It will cause the object to start moving, stop moving, or change direction.

• It will increase the object's temperature.

• It will charge the object electrically.

If a skateboard slows down and eventually stops, what is the most likely explanation?

• Newton's First Law of Motion is not applicable.

• There is no force acting on the skateboard.

• An unbalanced force, such as friction, is acting on the skateboard.

• The skateboard has run out of inertia.