Momentum and Impulse

Front

What does the law of conservation of momentum state?

Back

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

Front

How is momentum defined?

Back

Momentum is the product of an object's mass and its velocity (p = mv).

Front

What is impulse?

Back

Impulse is the change in momentum of an object when a force is applied over a period of time, calculated as the product of force and time (Impulse = F × t).

Front

What is the unit of momentum?

Back

The standard unit of momentum is kilogram meter per second (kg·m/s).

Front

What is the relationship between impulse and momentum?

Back

Impulse is equal to the change in momentum of an object (Impulse = Δp).

Front

If a 3 kg object is moving at 4 m/s, what is its momentum?

Back

The momentum is 12 kg·m/s (p = mv = 3 kg × 4 m/s).

Front

What happens to momentum in a perfectly elastic collision?

Back

In a perfectly elastic collision, both momentum and kinetic energy are conserved.

Front

What happens to momentum in an inelastic collision?

Back

In an inelastic collision, momentum is conserved, but kinetic energy is not.

Front

What is the formula for calculating impulse?

Back

Impulse = Force × Time (J = F × t).

Front

How does increasing the time of impact affect impulse?

Back

Increasing the time of impact increases the impulse, which can reduce the force experienced by an object.