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 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 average force and the time duration, represented by the formula J = FΔt.

Front

How is impulse related to momentum?

Back

Impulse is equal to the change in momentum of an object. This relationship is expressed as J = Δp, where J is impulse and Δp is the change in momentum.

Front

What is the formula for calculating impulse?

Back

Impulse (J) can be calculated using the formula J = FΔt, where F is the average force applied and Δt is the time duration of the force.

Front

What is the principle of conservation of momentum?

Back

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

Front

What is the effect of increasing collision time on impact force?

Back

Increasing the collision time reduces the average impact force experienced by an object, as impulse is spread over a longer duration.

Front

How does a padded gym mat affect impulse during a fall?

Back

A padded gym mat increases the time of impact, which reduces the average force experienced by the gymnast, thereby increasing safety.

Front

What is the relationship between force, mass, and acceleration?

Back

According to Newton's second law, the relationship is given by F = ma, where F is force, m is mass, and a is acceleration.

Front

How do crumple zones in cars enhance safety?

Back

Crumple zones are designed to increase the time of impact during a collision, which reduces the force experienced by the occupants, thereby enhancing safety.

Front

What is the unit of momentum?

Back

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