Checkpoint: Conservation of Momentum Calculations

Front

What is the principle of conservation of momentum?

Back

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

Front

When no external forces act on a system, how does the total momentum before a collision compare to the total momentum after the collision?

Back

The total momentum before a collision is equal to the total momentum after a collision.

Front

If two objects have a total momentum of 450 kgm/s before a collision, what will their total momentum be after the collision?

Back

Their total momentum will still be 450 kgm/s after the collision.

Front

How do you calculate the momentum of an object?

Back

Momentum is calculated using the formula: momentum = mass × velocity.

Front

What is the momentum of a 6 kg bowling ball rolling at 4 m/s?

Back

The momentum is 24 kgm/s (6 kg × 4 m/s).

Front

What is the momentum of an 8 kg bowling ball rolling at 3 m/s?

Back

The momentum is 24 kgm/s (8 kg × 3 m/s).

Front

If two objects collide and stick together, what type of collision is this?

Back

This is called a perfectly inelastic collision.

Front

In a perfectly inelastic collision, how is the final velocity of the combined masses determined?

Back

The final velocity is determined using the conservation of momentum: (m1*v1 + m2*v2) / (m1 + m2).

Front

What is the total momentum of a 4 kg box sliding at 12 m/s?

Back

The total momentum is 48 kgm/s (4 kg × 12 m/s).

Front

If a 4 kg box collides with a 2 kg box at rest, what is the combined mass after the collision?

Back

The combined mass is 6 kg (4 kg + 2 kg).