Momentum & 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 the impulse-momentum theorem?

Back

The impulse-momentum theorem states that the impulse on an object is equal to the change in momentum it causes.

Front

What happens to momentum when an object's mass is doubled and its speed is also doubled?

Back

The momentum becomes four times greater, as momentum is directly proportional to both mass and velocity.

Front

In an elastic collision, what is conserved?

Back

Both momentum and kinetic energy are conserved in an elastic collision.

Front

What is 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

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

How does increasing the time of impact affect the force experienced by an object?

Back

Increasing the time of impact decreases the force experienced by the object, as force is inversely proportional to time when impulse is constant.

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

What is the relationship between force, impulse, and momentum?

Back

The relationship is given by the equation: Impulse = Change in Momentum = Force × Time.

Front

Why are padded dashboards in cars safer during accidents?

Back

Padded dashboards increase the time of impact, which decreases the force experienced by passengers, reducing the risk of injury.