Energy and Newton's First Law of Motion

Front

What is Newton's First Law of Motion?

Back

Newton's First Law of Motion states that an object at rest will remain at rest, and an object in motion will continue in motion at a constant velocity unless acted upon by a net external force.

Front

What does inertia mean?

Back

Inertia is the tendency of an object to resist changes in its state of motion. The greater the mass of an object, the greater its inertia.

Front

What is a force?

Back

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

Front

What is weight?

Back

Weight is the force of gravity acting on an object, calculated as the mass of the object multiplied by the acceleration due to gravity (Weight = mass × gravity).

Front

How does mass relate to inertia?

Back

The inertia of an object is directly proportional to its mass; an object with greater mass has greater inertia.

Front

What happens to an object in motion if no forces act on it?

Back

If no forces act on an object in motion, it will continue to move in a straight line at a constant speed.

Front

What is an example of an unbalanced force?

Back

An unbalanced force occurs when two forces acting on an object are not equal in size or opposite in direction, causing the object to accelerate.

Front

What is the relationship between mass and weight?

Back

Weight is the product of mass and gravitational acceleration; therefore, weight increases with an increase in mass.

Front

What is an example of inertia in everyday life?

Back

When a car suddenly stops, passengers lurch forward due to inertia, as their bodies want to continue moving at the same speed.

Front

What is the role of friction in motion?

Back

Friction is a force that opposes motion between two surfaces in contact, affecting how objects move.