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

How is momentum conserved in collisions?

Back

In a closed system, the total momentum before a collision is equal to the total momentum after the collision, regardless of whether the collision is elastic or inelastic.

Front

What is the difference between elastic and inelastic collisions?

Back

In elastic collisions, both momentum and kinetic energy are conserved. In inelastic collisions, momentum is conserved, but kinetic energy is not.

Front

Calculate the momentum of a 2 kg object moving at 4 m/s.

Back

Momentum = mass × velocity = 2 kg × 4 m/s = 8 kg·m/s.

Front

What happens to momentum in a perfectly inelastic collision?

Back

In a perfectly inelastic collision, the colliding objects stick together, and the total momentum is conserved while kinetic energy is not.

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

If a 3 kg object moving at 5 m/s collides with a stationary object of 2 kg, what is the final velocity if they stick together?

Back

Final velocity = (3 kg × 5 m/s) / (3 kg + 2 kg) = 3 m/s.

Front

What is the unit of momentum?

Back

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

Front

Is momentum a scalar or vector quantity?

Back

Momentum is a vector quantity, meaning it has both magnitude and direction.

Front

What is the principle of conservation of momentum?

Back

The principle states that in an isolated system, the total momentum remains constant if no external forces act on it.