Force and Motion

Front

What is force?

Back

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

Front

What is motion?

Back

Motion is the change in position of an object over time.

Front

What are balanced forces?

Back

Balanced forces are two forces acting in opposite directions on an object, and they are equal in size, resulting in no change in motion.

Front

What are unbalanced forces?

Back

Unbalanced forces occur when two forces acting on an object are not equal, causing the object to move in the direction of the greater force.

Front

What is friction?

Back

Friction is a force that opposes motion between two surfaces that are in contact.

Front

What is gravity?

Back

Gravity is the force that pulls objects toward each other, such as the force that pulls us toward the Earth.

Front

What is thrust?

Back

Thrust is the force that moves an object forward, such as the force produced by an airplane's engines.

Front

What is lift?

Back

Lift is the force that acts perpendicular to the direction of motion and helps an object rise, such as the force that allows an airplane to fly.

Front

What is drag?

Back

Drag is the resistance force that acts opposite to the direction of motion, slowing an object down.

Front

What is the relationship between force and motion?

Back

Force causes motion; without a force, an object at rest will stay at rest, and an object in motion will stay in motion.