\[J = Ft\]
Variables
Jimpulse (N·s)
Fconstant force (N)
ttime interval (s)
Description
What is this formula?
The impulse equation calculates the change in momentum produced by a force acting over a period of time. Impulse is equal to the area under a force-time graph.
When to use it
Use this formula when analyzing impacts, collisions, braking systems, rocket propulsion, or any event where force acts during a time interval.
Example
A force of 150 N acts on an object for 0.4 s.
Data:
F = 150 N
t = 0.4 s
Formula:
J = F*t
Substitution:
J = 150*0.4
Result:
J = 60 N·s
Applications
Collision analysis, automotive safety, sports physics, aerospace engineering, impact mechanics, and mechanical system design.