GCSE Physics - Forces and Motion

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity. It is a vector quantity, meaning it has both magnitude and direction.

Front

What is the formula for calculating kinetic energy?

Back

Kinetic energy (KE) = 0.5 * mass (m) * velocity (v)^2.

Front

What is gravitational potential energy (GPE)?

Back

Gravitational potential energy is the energy an object possesses due to its position in a gravitational field, calculated as GPE = mass (m) * gravitational field strength (g) * height (h).

Front

What is the unit of force?

Back

The unit of force is the Newton (N).

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, measured in kilograms (kg), while weight is the force exerted by gravity on that mass, measured in Newtons (N).

Front

What is density?

Back

Density is the mass of an object divided by its volume, typically expressed in kilograms per cubic meter (kg/m³).

Front

What is the principle of conservation of momentum?

Back

The principle states that in a closed system, the total momentum before an event is equal to the total momentum after the event.

Front

What is thrust?

Back

Thrust is the force that propels an object forward, commonly associated with engines and propulsion systems.

Front

What is drag?

Back

Drag is the resistance force experienced by an object moving through a fluid (liquid or gas), opposing its motion.

Front

What is the formula for calculating the impact velocity of a dropped object?

Back

Impact velocity (v) = sqrt(2 * g * h), where g is the acceleration due to gravity (approximately 9.81 m/s²) and h is the height.