Newton's Laws of Motion - 12/2

Front

Mathematician, Astronomer, & Physicist who discovered Laws of Motion

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Isaac Newton

Answer explanation

Isaac Newton is the mathematician, astronomer, and physicist known for formulating the Laws of Motion, which laid the foundation for classical mechanics. The other options, like Marie Curie and Stephen Hawking, are notable in different fields.

Front

What is the standard unit force is measured in?

Back

Newtons

Answer explanation

The standard unit of force is measured in Newtons, named after Sir Isaac Newton. While pounds are used in some contexts, Newtons are the SI unit, making them the correct choice for measuring force.

Front

If a 40 kg student is pushed in a rolling chair with a force of 120 N, what is the student's acceleration?

Back

3 m/s2

Answer explanation

Using Newton's second law, F = ma, we can find acceleration (a) by rearranging the formula: a = F/m. Here, F = 120 N and m = 40 kg. Thus, a = 120 N / 40 kg = 3 m/s². Therefore, the correct answer is 3 m/s².

Front

A car driving down the road runs out of gas. Which of Newton's laws explains why the car continues to move without gasoline?

Back

1st - inertia

Answer explanation

Newton's 1st law, which describes inertia, explains that an object in motion stays in motion unless acted upon by an external force. The car continues to move after running out of gas because no sufficient force stops it immediately.

Front

According to Newton's second law, if you increase the force applied to an object:

Back

it accelerates more

Answer explanation

According to Newton's second law, force equals mass times acceleration (F=ma). Increasing the force applied to an object results in proportional response in acceleration, making 'it accelerates more' the correct choice. Increase force x 2 = increase acceleration x 2 if you hold mass constant

Front

Which of the following would be a good example of Newton's third law of motion?

Back

A carbon dioxide-fueled rocket launches upward into the air as carbon dioxide gas accelerates toward the ground below the rocket

Answer explanation

The correct choice illustrates Newton's third law: for every action, there is an equal and opposite reaction. The rocket pushes carbon dioxide gas downward, and in response, the rocket moves upward.

Front

What Newton's law does this picture represent?

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Newton's 1st law

Answer explanation

Newton's 1st law states that an object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force. The picture illustrates that the person driving the car will continue to move forward until the seatbelt acts upon the person

Front

What is the formula for force?

Back

F=M*A

Answer explanation

The formula for force is derived from Newton's second law of motion, which states that force (F) equals mass (M) multiplied by acceleration (A). Therefore, the correct choice is F=M*A.

Front

What is Newton's First Law known as?

Back

Inertia

Answer explanation

Newton's First Law is known as the Law of Inertia. It states that an object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

Front

What is Newton's Third Law?

Back

For every action there is an equal and opposite reaction

Answer explanation

Newton's Third Law states that for every action, there is an equal and opposite reaction. This means that forces always occur in pairs; when one object exerts a force on another, the second object exerts a force of equal magnitude in the opposite direction.