Impulse and Momentum

Front

What is impulse?

Back

Impulse is the change in momentum of an object when a force is applied over a period of time. It is calculated as the product of the average force and the time duration over which the force acts.

Front

What is the formula for calculating momentum?

Back

Momentum (p) is calculated using the formula: p = mass (m) × velocity (v).

Front

What are the standard metric units of impulse?

Back

The standard metric units of impulse are Newton-seconds (N·s).

Front

What are the standard metric units of momentum?

Back

The standard metric units of momentum are kilograms-meter per second (kg·m/s).

Front

State the law of conservation of momentum.

Back

The law of conservation of momentum states that in a closed system, the total momentum before an event is equal to the total momentum after the event, provided no external forces act on it.

Front

How does impulse relate to momentum?

Back

Impulse is equal to the change in momentum of an object. Mathematically, Impulse = Δp = p_final - p_initial.

Front

What happens to momentum when two objects collide in an isolated system?

Back

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

Front

If a 20,000 kg freight car moves at 15 m/s, what is its momentum?

Back

The momentum of the freight car is 300,000 kg·m/s.

Front

What is the effect of a southward impulse on a football player's momentum?

Back

A southward impulse will decrease the northward momentum of the player, potentially reversing it depending on the magnitude of the impulse.

Front

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

Back

Impulse is the product of force and the time duration over which the force acts: Impulse = Force × Time.