AP Physics Review Flashcard

Front

What is the relationship between speed and mass for objects falling in a vacuum?

Back

In a vacuum, all objects fall at the same rate regardless of their mass, so they have the same speed after falling the same distance.

Front

How does the density of a planet affect its surface gravity?

Back

Surface gravity is directly proportional to the density and radius of the planet. If a planet has lower density but larger radius, its surface gravity can still be high.

Front

What is electrical resistance and how is it measured?

Back

Electrical resistance is a measure of the opposition to the flow of electric current, measured in ohms (Ω).

Front

What is the formula for calculating work done by a force?

Back

Work done (W) is calculated as W = F × d × cos(θ), where F is the force, d is the distance moved, and θ is the angle between the force and the direction of motion.

Front

What is the formula for the energy stored in a capacitor?

Back

The energy (E) stored in a capacitor is given by E = 1/2 C V², where C is the capacitance in farads and V is the voltage in volts.

Front

Define inertia in the context of physics.

Back

Inertia is the property 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 principle of conservation of momentum?

Back

The principle states that the total momentum of a closed system remains constant if no external forces act on it.

Front

Explain the concept of friction and its types.

Back

Friction is the force that opposes the relative motion of two surfaces in contact. Types include static friction, kinetic friction, and rolling friction.

Front

What is the significance of potential energy in physics?

Back

Potential energy is the stored energy of an object due to its position or configuration, which can be converted into kinetic energy.

Front

How does the radius of a planet affect its gravitational pull?

Back

The gravitational pull increases with the mass of the planet and decreases with the square of the radius; larger radius can lead to lower gravity if density is not high.