Understanding Newton's Laws of Motion

Which of the following statements best describes Newton's First Law of Motion?

• 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.

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

• The gravitational force between two objects is proportional to the product of their masses.

Newton's Second Law of Motion is often expressed with which of the following equations?

According to Newton's Third Law of Motion, if a car exerts a force on a truck, what happens?

• The truck exerts a smaller force back on the car.

• The truck exerts an equal and opposite force back on the car.

• The truck exerts a larger force back on the car.

• The truck does not exert any force back on the car.

Which of the following is an example of Newton's First Law of Motion?

• A book sliding on a table eventually comes to a stop due to friction.

• A rocket launching into space.

• A swimmer pushing water backwards to move forward.

• A car accelerating when the gas pedal is pressed.

Which of the following scenarios is an example of Newton's Third Law of Motion?

• A ball rolling down a hill.

• A person sitting in a chair.

• A bird flying by flapping its wings.

• A car parked on a slope.

What is the net force on an object if it is moving with constant velocity?

• Greater than zero

• Zero

• Less than zero

• Equal to the object's mass

If the action force is a hammer hitting a nail, what is the reaction force according to Newton's Third Law?

• The nail pushing back on the hammer.

• The hammer moving forward.

• The nail bending.

• The hammer breaking.

Which of the following is NOT a consequence of Newton's First Law of Motion?

• An object in motion stays in motion unless acted upon by an external force.

• An object at rest stays at rest unless acted upon by an external force.

• An object will change its state of motion without any external force.

• An object will maintain its velocity unless a force acts on it.