TEK 8.6 Newton's Laws of Motion Review

Front

What is Newton's First Law of Motion?

Back

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

Front

What is Newton's Second Law of Motion?

Back

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F=ma).

Front

What is Newton's Third Law of Motion?

Back

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

Front

How does mass affect the amount of force needed to move an object?

Back

The greater the mass of an object, the more force is required to accelerate it.

Front

What is an unbalanced force?

Back

An unbalanced force is a force that causes an object to accelerate, as it is not equal and opposite to other forces acting on the object.

Front

What is the relationship between force, mass, and acceleration?

Back

According to Newton's Second Law, force equals mass times acceleration (F=ma). This means that for a given force, an increase in mass will result in a decrease in acceleration.

Front

Why is the nozzle of a rocket pointed downward?

Back

The nozzle is pointed downward to direct the exhaust gases backward, which, according to Newton's Third Law, pushes the rocket forward.

Front

What happens to the acceleration of an object when an unbalanced force is applied?

Back

The object will accelerate in the direction of the unbalanced force.

Front

What is the force exerted by an object when it is hit by another object?

Back

The force exerted by the object being hit is equal in magnitude and opposite in direction to the force exerted on it (Newton's Third Law).

Front

What is the significance of a hammer's head being made of steel?

Back

The heavy steel head creates a strong force for driving nails and is strong enough to resist the force of the nail pushing back.