Question

what's the formula used here​

Answer 1

Answer:

hlo ur answer is.............

Explanation:

it is u=v-at

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Answer 2

Answer:

initial velocity will be Zero

Explanation:

here one have to use the formula ⇒ v=  u + at

from the question,

30=u+2a     ........(1)

60=u+4a     ........(2)

now multiply equation(1) with '2' ,

then it comes out to be 60 = 2u + 4a   .........(3)

Now substract  eq.(2) from eq.(3) ,

60=2u+4a

60=u+4a

↔↔↔↔↔

0=2u-u

so u=o