Question

solve the 3rd and 4th questions.

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Answer 1

Answer:

Step-by-step explanation:

1) 3750 m

given ; v = 90km/hr = 25m/s

            u=om/s

           t = 5min=300sec

by Newtons 1 equation  

v=u+at

25 = o + 3ooa

a = 25/300

a= 1/12m/s^2

so now , by newtons 3 eqn ,

2as = v^2 - u^2

2*1/12*s = 25^2

1/6* s =625

s=625*6

s=3750 m

2) given ; v = 0m/s

                u=43.2km/hr= 12m/s

               a = -6m/s^2(retardation)

so by newtons 3 eqn

2as = v^2-u^2

2*-6*s=0-144

-12*s=-144

s= 144/12

s=12m

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