Question

class 9 questions
chapter- motion​

Answer 1

Answer:

Hey mate ^_^ this might help you!!

Explanation:

u= 0 m/s

v=?

distance=400 m

time=20 seconds

s= u x t + 1/2 at^2

400=0 x 20 + 1/2 x a x 20^2

400= 0+200 a

400/200=a

a= 2 m/s

force= mass x acceleration

f= 7000 x 2

f= 14000 kg/ms^2

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