Contact Forces and Non-Contact Forces Review

Front

What is the principle of action and reaction in physics?

Back

For every action, there is an equal and opposite reaction. This means that when one object exerts a force on another, the second object exerts an equal force in the opposite direction on the first object.

Front

What is the relationship between mass and force according to Newton's second law?

Back

Force is directly proportional to mass and acceleration, expressed as F = ma.

Front

What type of energy conversion occurs in an electric motor?

Back

An electric motor converts electrical energy into mechanical energy.

Front

What is a crumple zone in a vehicle?

Back

A crumple zone is a part of a vehicle designed to absorb the energy of a collision, reducing the force transmitted to the occupants.

Front

How do gravitational forces affect the motion of celestial bodies?

Back

Less massive objects revolve around more massive objects due to the gravitational pull exerted by the more massive objects.

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, electromagnetic).

Front

What is the formula for calculating gravitational force between two objects?

Back

The gravitational force can be calculated using Newton's law of universal gravitation: F = G * (m1 * m2) / r^2, where G is the gravitational constant, m1 and m2 are the masses of the objects, and r is the distance between their centers.

Front

What is the role of friction in motion?

Back

Friction is a contact force that opposes the relative motion of two surfaces in contact, affecting how objects move and stop.

Front

What is the significance of the center of mass in motion?

Back

The center of mass is the point where the mass of an object is concentrated, and it plays a crucial role in determining how an object moves and balances.

Front

What is the concept of inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion, meaning an object at rest stays at rest, and an object in motion stays in motion unless acted upon by an external force.