Physics Ch 07 Momentum

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 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

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 the product of the force and the time duration of its application.

Front

How is impulse related to momentum?

Back

Impulse is equal to the change in momentum of an object, expressed as Impulse = Δp = FΔt, where Δp is the change in momentum, F is the force, and Δt is the time duration.

Front

What happens to momentum in a collision?

Back

In a collision, the total momentum before the collision is equal to the total momentum after the collision, provided no external forces act on the system.

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

What is the formula for calculating impulse?

Back

Impulse can be calculated using the formula Impulse = Force × Time, or Impulse = Change in Momentum.

Front

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

Back

It is an inelastic collision, where the objects stick together after the collision, resulting in a loss of kinetic energy.

Front

What is the unit of momentum?

Back

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

Front

What is the unit of impulse?

Back

The unit of impulse is also kilogram meter per second (kg·m/s), which is equivalent to Newton-seconds (N·s).