Newton's Laws of Motion Quiz

What is Newton's first law of motion?

• An object in motion will change direction without any external force

• An object at rest will start moving on its own

• An object in motion will slow down and eventually stop

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

State Newton's second law of motion.

• The force acting on an object is equal to the mass of that object multiplied by its acceleration.

• The force acting on an object is equal to the mass of that object divided by its acceleration.

• The force acting on an object is equal to the distance traveled by that object divided by time.

• The force acting on an object is equal to the velocity of that object multiplied by its mass.

Explain Newton's third law of motion with an example.

• Newton's third law of motion states that objects at rest tend to stay at rest, and objects in motion tend to stay in motion.

• When a person walks, they push back on the ground (action), and the ground pushes them forward (reaction).

• Newton's third law of motion is about the force of gravity pulling objects towards the Earth.

• When a person walks, they push forward on the ground (action), and the ground pushes them back (reaction).

What is the formula to calculate force?

• F = a/m

• F = m/a

• F = mv

• F = ma

What is the unit of force?

• Second (s)

• Meter (m)

• Newton (N)

• Kilogram (kg)

Define inertia.

• Tendency to speed up

• Resistance to change in motion

• Ability to move freely

• Capacity to change direction easily

How does mass affect an object's inertia?

• Inertia is not affected by mass

• Mass has no effect on an object's inertia

• Mass affects an object's inertia by directly influencing the amount of force needed to change its state of motion.

• Increasing mass decreases inertia

Explain the concept of action and reaction in Newton's third law.

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

• For every action, there is a different reaction

• The reaction is always greater than the action

• Action and reaction are unrelated in Newton's third law

What is the acceleration of an object with a force of 20N and a mass of 5kg?

• 8 m/s^2

• 10 m/s^2

• 2 m/s^2

• 4 m/s^2

How does Newton's second law relate force, mass, and acceleration?

• Acceleration is equal to force divided by mass

• Force is equal to mass divided by acceleration

• Force is equal to mass times acceleration

• Mass is equal to force divided by acceleration