Physical Science Final S1

Front

What is Newton's Second Law?

Back

Newton's Second Law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. It can be expressed with the formula F = ma, where F is force, m is mass, and a is acceleration.

Front

What is weight?

Back

Weight is the gravitational force exerted on an object. It is calculated as the product of mass and the acceleration due to gravity (W = mg).

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion. It is calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.

Front

How does gravitational force change with distance?

Back

The gravitational force between two objects decreases as the distance between them increases. This relationship is described by the inverse square law.

Front

What is conduction?

Back

Conduction is the transfer of thermal energy through direct contact between materials. It occurs fastest in solids.

Front

What is convection?

Back

Convection is the transfer of thermal energy through the movement of fluids (liquids and gases). It occurs when warmer, less dense fluid rises and cooler, denser fluid sinks.

Front

What is radiation?

Back

Radiation is the transfer of energy through electromagnetic waves. It can occur in a vacuum and does not require a medium.

Front

What is inertia?

Back

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

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object and does not change regardless of location. Weight is the gravitational force acting on that mass and can change depending on the gravitational field.

Front

What is the formula for calculating gravitational force?

Back

The gravitational force between two objects can be calculated using Newton's law of universal gravitation: F = G(m1m2/r²), where F is the gravitational force, G is the gravitational constant, m1 and m2 are the masses of the objects, and r is the distance between their centers.