Momentum and Impulse

Front

What is momentum and how is it calculated?

Back

Momentum is the product of an object's mass and its velocity. It is calculated using the formula: p = mv, where p is momentum, m is mass, and v is velocity.

Front

What is impulse and how is it related to momentum?

Back

Impulse is the change in momentum of an object when a force is applied over a period of time. It is calculated using the formula: Impulse = Force × Time = Change in Momentum.

Front

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

Back

In a closed system, the total momentum before the collision is equal to the total momentum after the collision, according to the law of conservation of momentum.

Front

What is an elastic collision?

Back

An elastic collision is a collision in which both momentum and kinetic energy are conserved.

Front

What is an inelastic collision?

Back

An inelastic collision is a collision in which momentum is conserved, but kinetic energy is not conserved. The objects may stick together after the collision.

Front

How does doubling the speed of an object affect its momentum?

Back

Doubling the speed of an object doubles its momentum, since momentum is directly proportional to velocity (p = mv).

Front

Calculate the momentum of a 75 kg biker moving at 5 m/s.

Back

The momentum of the biker is calculated as p = mv = 75 kg × 5 m/s = 375 kg m/s.

Front

What is the final velocity of two objects that collide inelastically and stick together?

Back

The final velocity can be found using the conservation of momentum formula: (m1v1 + m2v2) / (m1 + m2), where m1 and m2 are the masses and v1 and v2 are their initial velocities.

Front

What is the formula for calculating the final velocities of two colliding objects?

Back

The formula is m1v1i + m2v2i = m1v1f + m2v2f, where m1 and m2 are the masses, v1i and v2i are the initial velocities, and v1f and v2f are the final velocities.

Front

What is the significance of a frictionless surface in momentum problems?

Back

A frictionless surface allows for the conservation of momentum to be applied without loss due to frictional forces.