Contact Forces and Non-Contact Forces Review

Front

What is Newton's 1st Law of Motion?

Back

Newton's 1st Law states that an object at rest will remain at rest, and an object in motion will continue to move at a constant velocity unless acted upon by an unbalanced force.

Front

What is Newton's 2nd Law of Motion?

Back

Newton's 2nd Law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass, expressed as F=ma.

Front

What is Newton's 3rd Law of Motion?

Back

Newton's 3rd Law states that for every action, there is an equal and opposite reaction.

Front

What is the difference between contact forces and non-contact forces?

Back

Contact forces require physical contact between objects (e.g., friction, tension), while non-contact forces act at a distance (e.g., gravitational, magnetic, electric forces).

Front

What is gravitational force?

Back

Gravitational force is the attractive force between two masses, which depends on their masses and the distance between them.

Front

How does a motor convert energy?

Back

A motor converts electrical energy into mechanical energy.

Front

What is the role of mass in gravitational attraction?

Back

The gravitational attraction between two objects increases with the mass of the objects.

Front

What is the relationship between mass and acceleration in Newton's 2nd Law?

Back

In Newton's 2nd Law, as mass increases, acceleration decreases for a given force.

Front

What is an unbalanced force?

Back

An unbalanced force is a net force that causes an object to accelerate, changing its state of motion.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion, directly related to its mass.