Conservation of Momentum

Front

What is the principle of conservation of momentum?

Back

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

Front

Define 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 an elastic collision?

Back

An elastic collision is a collision in which both momentum and kinetic energy are conserved.

Front

What is an inelastic collision?

Back

An inelastic collision is a collision in which momentum is conserved, but kinetic energy is not conserved; the objects may stick together after the collision.

Front

How do you calculate the final velocity of two objects that collide inelastically?

Back

Use the formula: (m1*v1 + m2*v2) / (m1 + m2), where m1 and m2 are the masses and v1 and v2 are the initial velocities of the two objects.

Front

What happens to momentum in a closed system during a collision?

Back

In a closed system, the total momentum before the collision is equal to the total momentum after the collision.

Front

If two objects collide and stick together, what type of collision is it?

Back

It is an inelastic collision.

Front

Calculate the momentum of a 5 kg object moving at 10 m/s.

Back

Momentum = mass * velocity = 5 kg * 10 m/s = 50 kg·m/s.

Front

What is the formula for calculating momentum?

Back

The formula for momentum is p = mv, where p is momentum, m is mass, and v is velocity.

Front

In a collision, if object A has a mass of 3 kg and is moving at 4 m/s, and object B has a mass of 2 kg and is stationary, what is the total momentum before the collision?

Back

Total momentum = (3 kg * 4 m/s) + (2 kg * 0 m/s) = 12 kg·m/s.