Momentum & Impulse & Law of conservation

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity, represented by the formula p = mv, where p is momentum, m is mass, and v is velocity.

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 Impulse = Force × Time.

Front

What is the Law of Conservation of Momentum?

Back

The Law of Conservation of Momentum states that in a closed system, the total momentum before an event (like a collision) is equal to the total momentum after the event.

Front

How do you calculate the change in momentum?

Back

Change in momentum is calculated as the final momentum minus the initial momentum, represented as Δp = p_final - p_initial.

Front

What is the relationship between force, mass, and acceleration?

Back

According to Newton's second law, Force = Mass × Acceleration (F = ma). This means that the force applied to an object is equal to the mass of the object multiplied by its acceleration.

Front

What is a perfectly elastic collision?

Back

A perfectly elastic collision is one in which both momentum and kinetic energy are conserved.

Front

What is a perfectly inelastic collision?

Back

A perfectly inelastic collision is one in which momentum is conserved, but kinetic energy is not; the colliding objects stick together after the collision.

Front

If a car has a momentum of 800 kg•m/s and is moving at a velocity of 10 m/s, what is its mass?

Back

Mass = Momentum / Velocity = 800 kg•m/s / 10 m/s = 80 kg.

Front

What factors affect the momentum of an object?

Back

Momentum depends on two factors: the mass of the object and its velocity.

Front

What is the average force exerted on an object?

Back

Average force can be calculated using the formula: Average Force = Change in Momentum / Time taken.