Sci 2 q2 finals

What is Newton's First Law of Motion?

• The total energy in a closed system remains constant

• Objects in motion tend to stay in motion unless a force is applied

• The rate of change of momentum is proportional to the applied force

• The gravitational force between two objects is inversely proportional to the square of the distance between them

What does Newton's Second Law of Motion state?

• The force acting on an object is equal to the mass of the object times its acceleration

• An object will remain at rest or in uniform motion unless acted upon by an external force

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

• The force of gravity acts between all masses

What is force according to Newton's Second Law of Motion?

• Any influence that can change the mass of an object

• Any influence that can change the shape of an object

• Any influence that can change the velocity of an object

• Any influence that can change the temperature of an object

What is required for an object to change its velocity?

• A net force

• A balanced force

• A constant velocity

• A decrease in mass

How is acceleration related to the net force applied to an object?

• Acceleration is inversely proportional to the net force

• Acceleration is directly proportional to the net force

• Acceleration is independent of the net force

• Acceleration is equal to the net force

How is acceleration related to the mass of an object?

• Acceleration is inversely proportional to the mass

• Acceleration is directly proportional to the mass

• Acceleration is independent of the mass

• Acceleration is equal to the mass

What is the equation that represents Newton's Second Law of Motion?

• F = mt, where F is force, m is mass, and t is time

• F = mg, where F is force, m is mass, and g is gravity

• F = mv, where F is force, m is mass, and v is velocity

• F = ma, where F is force, m is mass, and a is acceleration

What does Newton's Third Law of Motion state?

• The force of gravity acts between all masses

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

• An object will remain at rest or in uniform motion unless acted upon by an external force

• The force acting on an object is equal to the mass of the object times its acceleration

What is momentum?

• The product of an object's mass and acceleration

• The product of an object's mass and velocity

• The product of an object's velocity and time

• The product of an object's force and time

Which of the following best explains why a train has greater momentum than a car moving at the same velocity?

• The train has a larger mass

• The train has a higher velocity

• The train has a greater acceleration

• The train has a longer time of travel