Unit 4: Momentum, Impulse, Conservation, Collisions

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 force and the time duration the force is applied (Impulse = Force × Time).

Front

What is the law of conservation of momentum?

Back

The law of conservation of momentum states that in a closed system, the total momentum before and after a collision remains constant, provided no external forces act on it.

Front

How do you calculate momentum?

Back

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

Front

What are the units of momentum?

Back

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

Front

What is the relationship between impulse and momentum?

Back

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

Front

What is the formula for calculating impulse?

Back

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

Front

What is a perfectly elastic collision?

Back

In a perfectly elastic collision, both momentum and kinetic energy are conserved. Objects bounce off each other without any loss of energy.

Front

What is a perfectly inelastic collision?

Back

In a perfectly inelastic collision, momentum is conserved, but kinetic energy is not. The colliding objects stick together after the collision.

Front

How do you find the total momentum of a system?

Back

To find the total momentum of a system, sum the momenta of all individual objects in the system: p_total = p1 + p2 + ... + pn.