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

In an isolated system, the total momentum before a collision is equal to the total momentum after the collision.

Front

How does increasing the time of impact reduce injury in a collision?

Back

Increasing the time of impact reduces the force experienced by the body, as force is equal to the change in momentum divided by the time taken for that change.

Front

What happens to momentum when two objects collide and stick together?

Back

The total momentum before the collision is equal to the total momentum after the collision, and the two objects move together as one mass.

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

If a 0.15 kg ball is moving at 10 m/s, what is its momentum?

Back

The momentum is p = mv = 0.15 kg * 10 m/s = 1.5 kg·m/s.

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 mass affect momentum?

Back

An increase in mass will result in a proportional increase in momentum if velocity remains constant.

Front

What is the relationship between force, change in momentum, and time?

Back

Force is equal to the change in momentum divided by the time over which the change occurs (F = Δp/Δt).

Front

What happens to the speed of a wagon as rain collects inside it?

Back

The speed of the wagon decreases because the mass of the wagon increases while the momentum must be conserved.