Unit 3 Review

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

How do you calculate momentum for a moving object?

Back

Momentum (p) is calculated using the formula p = mv, where m is the mass of the object in kilograms and v is its velocity in meters per second.

Front

What is the unit of momentum?

Back

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

Front

What happens to momentum in a closed system during a collision?

Back

In a closed system, the total momentum before a collision is equal to the total momentum after the collision, according to the Law of Conservation of 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, calculated as impulse = force × time.

Front

How do you calculate impulse?

Back

Impulse can be calculated using the formula: Impulse = Force × Time, where Force is in Newtons and Time is in seconds.

Front

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

Back

Impulse is equal to the product of the average force applied to an object and the time duration over which the force is applied.

Front

What is the purpose of crumple zones in vehicles?

Back

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

Front

What is the effect of a hard surface versus a soft surface on impact force?

Back

A hard surface (like a wall) results in a greater force of impact compared to a soft surface (like a bed sheet) due to the shorter time of impact.

Front

What does the Law of Conservation of Momentum state?

Back

The Law of Conservation of Momentum states that the total momentum of a closed system remains constant if no external forces act on it.