Question

a car of a mass 1500kg starts from reaches velocity 72km/h in 5sec .calucalute force​

Answer 1

Answer:

force = 6000 N

Explanation:

as the car starts from rest and reaches velocity 72 km/hr in 5 sec

72 km/hr =  72* 5/18  = 20 m/s

acceleration = v-u/t =  20- 0/5

                                  = 4 m/s²

now, force = mass * acceleration

                  =  1500*4

                  =  6000 N

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Answer 2

Momentum of car at speed 36km/h=10m/s=m×10
=1500×10
=15000kg m/s
Momentom of car at speed 72km/h=20m/s=m×20
=1500×20
=30000kg m/s
Momentom change=30000−15000=15000kg m/s