BMST - Basic Math and Science Newton's Laws of Motion Questions and Answers 2

Question 1

Newton's First Law of Motion states that an object at rest stays at rest unless acted upon by:

Accepted Answer

An unbalanced external force

Answer

The First Law (law of inertia) states objects maintain their state of motion unless an unbalanced force acts on them.

Question 2

According to Newton's Second Law, what is the acceleration of a 5 kg object with a net force of 20 N?

Accepted Answer

4 m/s²

Answer

F = ma, so a = F/m = 20 N / 5 kg = 4 m/s².

Question 3

Newton's Third Law is best described as:

Accepted Answer

For every action, there is an equal and opposite reaction

Answer

The Third Law states that forces always come in equal and opposite pairs.

Question 4

A 10 kg box is pushed with 50 N of force on a frictionless surface. What is the acceleration?

Accepted Answer

5 m/s²

Answer

a = F/m = 50 N / 10 kg = 5 m/s².

Question 5

What is inertia?

Accepted Answer

The tendency of an object to resist changes in its state of motion

Answer

Inertia is the resistance to changes in motion; it depends on mass — more mass means more inertia.

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