Forces and Newton's Laws of Motion

Which unit is used to measure speed?

• Newtons (N)

• Meters (m)

• Meters per second (m/s)

• Kilograms (kg)

What does Newton's first law state about an object's motion?

• An object's motion can change without any force acting on it.

• A force is needed to keep an object moving.

• An object's motion cannot change unless a force acts on it.

• Friction is the only force affecting an object's motion.

What force opposes the motion of an object in everyday situations?

• Gravity

• Friction

• Magnetism

• Electromagnetic Force

According to Newton's second law, what happens to the acceleration of an object if the force applied to it increases?

• The acceleration decreases

• The acceleration remains the same

• The acceleration increases

• The acceleration becomes negative

Tags

NGSS.MS-PS2-2

Newton's second law is summarized by which equation?

Tags

NGSS.MS-PS2-2

What does Newton's third law state about forces?

• Forces act independently of each other

• Forces always result in motion

• Every force has an equal and opposite reaction force

• Forces are directly proportional to mass

Tags

NGSS.MS-PS2-1

Which of the following is an example of Newton's third law in action?

• A car stopped in the driveway

• A soccer ball hitting a goal post

• A book resting on a table

• A bird sitting in a nest

Tags

NGSS.MS-PS2-1

What is the unit used to measure force?

• Newtons (N)

• Kilograms (kg)

• Meters per second (m/s)

• Joules (J)

What force is responsible for slowing down a rolling ball on the ground?

• Gravity

• Magnetism

• Friction

• Electromagnetic Force

Tags

NGSS.MS-PS2-2

Which law of motion describes an object's resistance to a change in its motion?

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• None of these