Momentum and Conservation

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity, represented by the formula p = mv.

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.

Front

How does a softer landing affect collision time?

Back

A softer landing increases collision time, which reduces the impact force experienced.

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 when a force is applied?

Back

Impulse can be calculated using the formula: Impulse = Change in momentum = Final momentum - Initial momentum.

Front

What happens to the momentum of two objects before and after a collision?

Back

The total momentum before the collision is equal to the total momentum after the collision, assuming no external forces.

Front

If a 5 N force slows a 3 kg ball from 9 m/s to 3 m/s, what is the impulse?

Back

The impulse on the ball is -18 N⋅s.

Front

What is the formula for calculating momentum?

Back

The formula for momentum is p = mv, where p is momentum, m is mass, and v is velocity.

Front

In a collision where two objects stick together, how do you find their final velocity?

Back

Use the conservation of momentum: (m1*v1 + m2*v2) / (m1 + m2) = final velocity.

Front

What is the effect of mass on momentum?

Back

An increase in mass will increase momentum if velocity remains constant, as momentum is directly proportional to mass.