Exploring Newton's Laws of Motion

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

• An object will accelerate if a force is applied.

• An object will remain at rest or move at a constant velocity unless acted upon by a net external force.

• The force applied is equal to mass times acceleration.

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

What is inertia?

• The force that causes objects to move.

• The tendency of an object to resist a change in its motion.

• The acceleration of an object due to gravity.

• The friction between two surfaces.

Which of the following is the correct equation for Newton’s Second Law?

Which of the following statements about mass and weight is correct?

• Mass and weight are the same thing.

• Weight is the force due to gravity acting on a mass.

• Mass is measured in newtons.

• Weight does not change with location.

A car is moving at a constant velocity. What can you say about the net force acting on it?

• The net force is zero.

• The net force is equal to the car’s weight.

• The net force is equal to the frictional force.

• The net force is equal to the engine force.

Which of the following is NOT an example of Newton’s First Law?

• A book resting on a table remains at rest.

• A ball rolling on a smooth surface keeps rolling at the same speed.

• A car accelerates when the driver presses the accelerator.

• A hockey puck slides on ice until friction slows it down.

What is the SI unit of force?

• Kilogram

• Newton

• Joule

• Watt