Which of the following perfectly defines the Impulse?

The correct answer is option 3) i.e. Force applied to a body for a period of time.

CONCEPT:

• Impulse (J or Δp): The change in momentum is called impulse.
  • It is also called force applied for a small time.

The Impulse is given by:

​Δp = F_net Δt

EXPLANATION:

• Impulse is the integral of a force, F, over the time interval, t, for which it acts.
• Hence, force applied to a body for a period of time is what is called impulse.
• Since force is a vector quantity, the impulse is also a vector quantity.