Question

If u Know the answer plzz tell me the formula..

Answer 1

u = ?
v = 0
t = 25 seconds
a = -0.4 m/s²

Using 1st equation of uniformly accelerated motion.
v = u+at
0 = u+(-0.4*25)
-u = -10
u = 10 m/s

Now,
Using 2nd equation of uniformly accelerated motion.
v² = u²+2as
0² = 10² + (2*-0.4*s)
-100 = -0.8s
s = -100/-0.8
s = 1000/8
s = 125 metres.

Distance covered will be 125 metres.