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Impulse is the change in momentum. Therefore Impulse is only equal to momentum if the initial momentum was equal to zero. Its the same phenomenon as position and displacement.

Impulse= final momentum-initial momentum= mv - mv_0= Force * Time

Where m is the mass and v is the velocity.

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Why is it incorrect to say that impluse equals momentum?

Impulse is a measure of the change in momentum, not its equivalence. Momentum is the product of an object's mass and velocity, while impulse is the product of force and time over which the force acts. So, they are related but not equal.


It is correct to say that impulse is equal to?

Impulse is equal to the change in momentum of an object. Mathematically, impulse (J) is equal to the force (F) applied to an object multiplied by the time (t) over which the force is applied, which can be expressed as J = F * t.


What happens to momentum when an impulse acts on a system?

Strictly speaking, you would say that a force acts on a system and the impulse of that force corresponds to the change in momentum of the system due to the action of the force. More mathematically, the impulse of a force is defined as the integral of that force with respect to time over the time period that the force acts.


If the velocity is constant does that mean that there is no impulse?

Not necessarily. Impulse Fdt=change in momentum which could be written as mdv (constant mass, velocity changing) or dmv (changing mass, constant velocity - the so-called conveyor belt problem. Imagine a hopper filled with (say) coal is feeding the coal on to a conveyor belt. The mass of the belt increases with time, so a force has to be applied to it to keep it moving at constant velocity.


What does it mean to say momentum is conserved?

What does it mean to say momentum is conserved?


What if your friend says that the law of conservation of momentum violated when a ball rolls down a hill and gain momentum what do you say?

it could be said that since potential energy (mgh) is lost at the exact rate kinetic energy (ke) is gained, that energy is translated into another form since force applied (gravity) over time then impulse applied and increase of momentum


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One railroad car rolls toward another Describe the properties of the first car that determine its momentum and how it would impart an impulse to the second car?

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When the momentum within a system is the same before and after an event you say that what?

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