A 2500kg car hits a fence with a force of 400 N and the collision takes one second. what is the magnitude of the impulse?

The impulse experienced by the car can be calculated using the equation Impulse = Force x Time. Plugging in the values, the impulse is equal to 400 N x 1 s = 400 Ns. So, the magnitude of the impulse is 400 Ns.