Understanding Impulse

Impulse is the change in momentum of an object. It's calculated as:

* Impulse (J) = Force (F) * Time (t)

Solving the Problem

1. Identify the given information:

* Force (F) = 400 N

* Time (t) = 1 second

2. Apply the impulse formula:

* Impulse (J) = 400 N * 1 s = 400 Ns

Answer

The magnitude of the impulse is 400 Ns.