Unit 1 Forces

Front

What are balanced forces?

Back

Balanced forces are two or more forces acting on an object that are equal in size and opposite in direction, resulting in no change in motion.

Front

What are unbalanced forces?

Back

Unbalanced forces occur when the total force acting on an object is not zero, causing the object to accelerate or change its motion.

Front

What is the effect of unbalanced forces on an object?

Back

Unbalanced forces cause an object to start moving, stop moving, or change direction.

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 at a constant velocity unless acted upon by an unbalanced force.

Front

What is Newton's Third Law of Motion?

Back

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

Front

What is a force pair?

Back

A force pair consists of two forces that are equal in size, opposite in direction, and act on two different objects.

Front

What is an example of balanced forces?

Back

A book resting on a table experiences balanced forces: the force of gravity pulling it down and the normal force from the table pushing it up.

Front

What is an example of unbalanced forces?

Back

A soccer ball being kicked experiences unbalanced forces, as the force of the kick is greater than the forces acting against it.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object, caused by the contact between two surfaces.

Front

What is gravity?

Back

Gravity is a force that attracts two bodies toward each other, depending on their masses and the distance between them.