Momentum and Impulse

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

State the law of conservation of momentum.

Back

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

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 conserved; some energy is transformed into other forms.

Front

Define elastic collision.

Back

An elastic collision is a collision in which the objects bounce off each other, and both momentum and kinetic energy are conserved.

Front

Define inelastic collision.

Back

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

Front

What is Newton's 3rd Law of Motion?

Back

Newton's 3rd Law states that for every action, there is an equal and opposite reaction.

Front

Calculate the total momentum of two colliding objects with momenta of 5 kg m/s and 3 kg m/s.

Back

Total momentum = 5 kg m/s + 3 kg m/s = 8 kg m/s.

Front

If a 2 kg object moving at 3 m/s collides with a stationary object, what is the momentum before the collision?

Back

Momentum before collision = mass × velocity = 2 kg × 3 m/s = 6 kg m/s.