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Plz help me how to do this I know it’s easy but it isn’t for me watch

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    concrete wall
    Fig. 2.1
    In a laboratory test, a car of mass 1200 kg is driven into a concrete wall, as shown in Fig. 2.1.
    A video recording of the test shows that the car is brought to rest in 0.36s when it collides with the wall. The speed of the car before the collision is 7.5 m / s.

    the change of momentum of the car,

    Can you workout what the momentum before the collision is? Do you know what the formula for the change of momentum is? How would you use this to find the change in momentum?

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