Question

19. A train starts from rest with an acceleration of 2ms A man who is ºm behind the train runs
with uniform speed and just manages to get into the train in 10sec, The speed of the man
1) 9ms?
2) 8.7ms-
3) 4.5ms 1
4) 10.9m







please say me the answer I have to do still more sums​

Answer 1

$Acceleration , \: a = 2m/ {s}^{2} \ \\ \ s \: = \: 9m \\ t \: = \: 10 \: s$

$s \: = ut \: + \frac{a {t}^{2} }{2}$

→ 9 = 10 u + 100

→ -91 = 10 u

→ - 9.1 m/s = u

option 1 is crct