Question

Please explain this ques easily​

Answer 1

Answer:

u=6m/s      a=2m/s2

Explanation:

using the 1st equation of motion:  u+at=v

equation 1:  u+3a=12

equation 2: u+6a=18

u+6a= 18

-u -3a= -12 [changing the signs.        u and -u gets cancelled]

________

6a-3a=18-12

3a=6

a=2(ans)

so, u+3*2=12  [replacing a by 2]

u+6=12

u=12-6

u=6(ans)