Force and Motion

Front

What is the definition of force?

Back

A force is a push or pull that can cause an object to move, stop, or change direction.

Front

What are the two main types of forces?

Back

The two main types of forces are contact forces (forces that occur when objects touch) and non-contact forces (forces that act at a distance, such as gravity).

Front

What is the effect of balanced forces on an object?

Back

Balanced forces do not cause a change in motion; the object remains at rest or continues to move at a constant speed.

Front

What is the effect of unbalanced forces on an object?

Back

Unbalanced forces cause an object to accelerate, change direction, or change its state of motion.

Front

What is friction?

Back

Friction is the force that opposes the motion of an object when it is in contact with another surface.

Front

What factors affect the amount of friction between two surfaces?

Back

The amount of friction depends on the types of surfaces in contact and the force pressing them together.

Front

What is gravity?

Back

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

Front

How does gravity affect objects on Earth?

Back

Gravity pulls objects toward the center of the Earth, giving them weight and causing them to fall when dropped.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force of gravity acting on that mass.

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.