In a laboratory test, a car of mass 1200kg is driven into a concrete wall. a video recording of the test shows that the car is bought to rest in 0.36 s when it collides with the wall. The speed of the car before collision is 7.5 m / s. calculate
i) The change of momentum of the car.
ii)The average force acting on the car.

diagram is missing, but i will try to explain your doubt.

answer:

amplitude is the maximum displacement or distance moved on a point of a vibrating body or wave measured from its equilibrium position.it is equal to half the length of vibration path.

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