Force and Motion

Front

What is an unbalanced force?

Back

An unbalanced force is a force that causes an object to change its state of motion, either by starting to move, stopping, or changing direction.

Front

What is the relationship between force and motion?

Back

Force is a push or pull that can cause an object to move or change its motion. Motion is the change in position of an object.

Front

What is Newton's First Law of Motion?

Back

An object at rest will stay at rest, and an object in motion will stay in motion at a constant velocity 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

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 towards each other, commonly experienced as the force that pulls objects towards the Earth.

Front

What is the difference between mass and weight?

Back

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

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion.

Front

What is the role of a hand brake in a bicycle?

Back

A hand brake uses friction to slow down or stop the bicycle by pressing a rubber pad against the tire.