Amazing Unit 3 flashcardziz

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity, represented by the formula p = mv.

Front

When is momentum conserved?

Back

Momentum is conserved in a closed system where no external forces are acting.

Front

What factors affect impulse?

Back

Impulse is affected by the force applied and the time duration over which the force is applied, represented by the formula Impulse = Force x Time.

Front

What is the relationship between impulse and momentum?

Back

Impulse is equal to the change in momentum of an object, represented by the formula Impulse = Δp.

Front

What happens to momentum when two objects collide elastically?

Back

In an elastic collision, both momentum and kinetic energy are conserved.

Front

What happens to momentum when two objects collide inelastically?

Back

In an inelastic collision, momentum is conserved, but kinetic energy is not.

Front

How does an airbag reduce injury in a car crash?

Back

An airbag increases the time over which the force acts during a crash, reducing the force experienced by the occupants.

Front

What is the formula for calculating impulse?

Back

Impulse = Change in momentum = Final momentum - Initial momentum.

Front

What is the effect of external forces on momentum?

Back

External forces, such as friction or gravity, can change the total momentum of a system.

Front

What is the significance of a brick wall vs. a haystack in terms of impulse?

Back

Both a brick wall and a haystack provide the same impulse to a car, but the wall exerts a greater force over a shorter time.