Question

please answer fastly. I will mark it as brainliest.​

Answer 1

Answer:

(d) option is correct answer

Explanation:

According to question  

at   t=2s         ,        v=20m/s

at   t=4s          ,       v=40m/s

now,

acceleration = $\frac{dv}{dt} = \frac{40-20}{4-2} = \frac{20}{2} = 10$m/s

a=10m/s

from 1  

st

 equation of motin is first case  

v=u+at

20=u+10(2)

20=u+20

u=0

Hence (d) option is correct answer

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