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A bullet fired with a speed of 50m/s is stopped by a depth of 10 cm by a wall.What is the retardation offered by  wall ?
Asked by nishola82 | 22 May, 2018, 11:30: PM
answered-by-expert Expert Answer
Firing speed of bullet = 50 m/s. 
 
stopping depth of wall = 10 cm = 0.1 m
 
we use the equation " v2 = u2 + 2aS ", where v is final speed (v =0 here ), u is initial speed, a is retardation and S is depth of wall.
 
retardation a = 50×50 /(2×0.1) = 12500 m/s2
Answered by Thiyagarajan K | 23 May, 2018, 02:10: PM

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