Question

An automobile of mass 7000kg starts moving with an accleration which remains constant 20sec. If it covers a distance of 1km. find the force applied?​

Answer 1

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PLS MARK AND BRAINLIST

Initial velocity of the truck, u=0

Distance covered by the truck, s=400 m

Time taken to cover that distance, t=20 s

Let the acceleration of the truck be  a

s=ut+21at2

400=(0)20+21a(20)2  

a=2 m/s2

Mass of the truck    M=7 tonnes=7000 kg        (∵1 tonne=1000 kg)

F=Ma=7000×2 =14000 N