Understanding Impulse

Impulse is the change in momentum of an object. It's calculated using the following formula:

* Impulse (J) = Force (F) x Time (Δt)

Applying the Information

* Force (F) = 400 N

* Time (Δt) = 1 second

Calculating the Impulse

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

Therefore, the magnitude of the impulse is 400 Ns.