Answer
The magnitude of the average force that acts on the car during the collision is $~~21,200~N$
Work Step by Step
In part (b), we found that the impulse on the car due to the collision is $~~(-7420~\hat{i})~kg~m/s$
The magnitude of the impulse is $7420~kg~m/s$
We can find the magnitude of the average force that acts on the car during the collision:
$F~t = J$
$F = \frac{J}{t}$
$F = \frac{7420~kg~m/s}{0.350~s}$
$F = 21,200~N$
The magnitude of the average force that acts on the car during the collision is $~~21,200~N$
