NCEA Level 2 Mechanics Practice Test

Question: 1 / 400

How is impulse related to momentum?

Impulse increases momentum

Impulse is directly related to momentum through the impulse-momentum theorem, which states that the impulse applied to an object is equal to the change in its momentum. This relationship can be expressed mathematically as:

Impulse = Change in Momentum

This means that when a force acts on an object for a period of time, it creates an impulse that results in a change in the object's momentum. For example, if a soccer ball is kicked and experiences a force from the foot, the impulse generated by that force causes the ball's momentum to increase, leading to a change in its velocity and direction.

This understanding highlights that impulse does not merely increase momentum but is fundamentally a measure of how momentum changes as a result of an external force applied over time. The other choices either misrepresent the relationship or lack relevance to the fundamental physics principles governing momentum and impulse.

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Impulse equals momentum before a collision

Impulse is the rate of change of momentum

Impulse has no relationship to momentum

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