acceleration = change in velocity/change in time
Your velocity decreased by 54 km/hr in 5 seconds. Before doing the division, you will have to change 1 hour to seconds or 5 seconds to a portion of an hour. You need like units.
To calculate the inital momentum of the vehicle tons should be changed to kilograms. What else do you have to change to get the proper units for momentum?
A vehicle with a mass of 2 tons travels on a horizontal road at a speed of 126km/h.The driver notices a donkey at the side of the road and decides to reduce speed. The brakes are applied and the vehicle slows down to 72km/h after 5 seconds. Calculate the distance travelled during the acceleration .calculate the initial momentum of the vehicle
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