Question

calculate the impulse necessary to stop a 2000kg car travelling at 72km per hour​

Answer 1

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momentum = Mv

= 2000 × 72

= 144000

Answer 2

Answer:

given = mass = 2000Kg

            speed = 72Km/ hr  convert it into m/s so, 72 x 5/18= 20m/s

to find = impulse ?

solution = impulse = change in momentum

             = initial momentum - final momentum

             = 200 x 0 - 200 x 20

             =  0 -  40000

             = -40000Ns

so, the necessary impulse to stop a 2000Kg car travelling at 72km per hour​is -40000Ns.