Question

3 when should you use the $f_{net} cdot delta t$ side of the impulse - momentum theorem?

• this side of the equation should be used when the velocity of an object changes, changing that objects momentum.
• this side of the equation should be used when an object has a force applied for a certain time period.
• this side of the equation should be used when the force being applied to the object causes the object to decelerate.
• this side of the equation should be used when the impulse does not equal the change in momentum.

Explanation:

The impulse-momentum theorem states that impulse ($F_{net} \cdot \Delta t$) equals change in momentum. The $F_{net} \cdot \Delta t$ term directly calculates impulse, which depends on the net force acting on an object over a specific time interval. The other options are incorrect: the momentum change side is used for velocity changes, deceleration is a specific force case, and impulse always equals momentum change per the theorem.

Answer:

B. This side of the equation should be used when an object has a force applied for a certain time period.