Conservation of Momentum in Collisions (Take 1)

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 does momentum change when the speed of an object is doubled?

Back

When the speed of an object is doubled, its momentum also doubles, since momentum is directly proportional to velocity.

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

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 happens to momentum in elastic collisions?

Back

In elastic collisions, both momentum and kinetic energy are conserved.

Front

What happens to momentum in inelastic collisions?

Back

In inelastic collisions, momentum is conserved, but kinetic energy is not conserved; some kinetic energy is transformed into other forms of energy.

Front

If a 0.030 kg bullet is fired from a gun with a speed of 350 m/s, what is the momentum of the bullet?

Back

The momentum of the bullet is p = mv = 0.030 kg * 350 m/s = 10.5 kg·m/s.

Front

What is the recoil speed of a gun if a bullet is fired?

Back

The recoil speed of the gun can be calculated using conservation of momentum, where the momentum of the bullet equals the momentum of the gun in the opposite direction.

Front

How do you find the final speed of two colliding objects that stick together?

Back

To find the final speed, use the formula: (m1*v1 + m2*v2) / (m1 + m2), where m1 and m2 are the masses and v1 and v2 are their velocities.

Front

What is the momentum of a 0.4 kg object rolling at 2 m/s?

Back

The momentum is p = mv = 0.4 kg * 2 m/s = 0.8 kg·m/s.