Momentum, Impulse, Collisions

Front

What is the definition of a 'closed system' in relation to the conservation of momentum?

Back

A closed system is one where momentum is conserved because there is no external force acting on it, such as friction or air resistance.

Front

True or False? Airbags keep you safe by decreasing the time of impact in a collision, thus decreasing the impact force.

Back

False. Airbags increase the time of impact, which decreases the force experienced by the occupant.

Front

What happens to the momentum of two carts that collide and stick together?

Back

The combined system will move in the direction of the cart with greater momentum after the collision.

Front

True or False? In an open system, momentum is always conserved.

Back

False. In an open system, external forces can affect momentum, leading to its non-conservation.

Front

In an inelastic collision, what happens to momentum and kinetic energy?

Back

Momentum is conserved, but kinetic energy is not conserved.

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity, represented as 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 Impulse = Force × Time.

Front

What is the principle of conservation of momentum?

Back

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

Front

What is an elastic collision?

Back

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

Front

What is an inelastic collision?

Back

An inelastic collision is one in which momentum is conserved, but kinetic energy is not conserved, often resulting in deformation.