Sound and Newtons laws of Motion

Newton's first law of motion is also known as

• the law of acceleration
• the law of inertia
• the law of force
• the law of momentum

Which of the following is an example of Newton's first law?

• A book resting on a table.
• A car accelerating on a straight road.
• A person pushing a heavy object forward.
• A ball rolling on a flat surface eventually stops due to friction.

Newton's second law of motion is mathematically represented as:

• F = mv
• F = a/m
• F = ma

If the force acting on an object is doubled, while its mass remains constant, the acceleration will:

• quadruple
• remain the same
• double
• decrease by half

Which law explains why we need to wear seatbelts while driving?

• Law of Universal Gravitation
• Newton's Second Law of Motion
• Law of Conservation of Energy
• Newton's First Law of Motion (law of inertia)

The force required to accelerate a 5 kg object at 2 m/s² is:

• 20 N
• 10 N
• 15 N
• 5 N

The unit of force is:

• newton (N)
• watt (W)
• pascal (Pa)
• joule (J)

Newton's third law states that:

• Every action leads to a greater reaction.
• For every action, there is an equal and opposite reaction.
• For every action, there is no reaction.
• For every action, there is a proportional reaction.

A 20 N force is applied to a 10 kg object. What is the acceleration of the object?

• 2 m/s²
• 1 m/s²
• 5 m/s²
• 4 m/s²

Which of the following is true according to Newton's third law?

• For every action, there is an equal and opposite reaction.
• An object at rest will remain at rest unless acted upon by a force.
• For every action, there is a proportional reaction.
• The force of an action is always greater than the force of the reaction.