Newton's Laws of Motion Flashcard

Front

What are balanced forces?

Back

Forces that are equal in size but opposite in direction, resulting in no change in motion.

Front

What force causes objects to fall towards the Earth?

Back

Gravity is the force that pulls objects towards the Earth.

Front

What happens when two forces acting on an object are unbalanced?

Back

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

Front

What is the force exerted by a chair on the floor if it weighs 20 N?

Back

The floor exerts an equal force of 20 N upward on the chair.

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 unless acted upon by a net external 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

What is an example of friction?

Back

Friction is the force that opposes the motion of an object, such as a soccer ball rolling on grass.

Front

What is the relationship between mass and weight?

Back

Weight is the force of gravity acting on an object's mass (Weight = mass x gravity).

Front

What is an example of unbalanced forces?

Back

If one dog pulls a shoe with a greater force than another dog, the shoe will move in the direction of the stronger pull.