Question

pls tell how to solve with formula

Answer 1

v = 0 m/s
u = 50 m/s
s = 10 cm = 0.1 m ( 1m = 100cm )

v^2 = u^2 + 2as
0 = ( 50 )^2 + 2 * a * 0.1
0 = 2500 + 0.2 a
-2500 = 0.2 a
a = -2500 / 0.2
= -12500 m/s^2

Therefore, retardation offered by wall is -12500 m/s^2

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