Question

A bullet of mass 12 g is fired at a speed of 1300 m/s and gets embedded into a sand bag till 7 cm. calculate the resistive force

Answer 1

F= ma

m= 20g = 2/100kg

a = ?

v2 = u2 + 2as

v = 0(it comes to rest)

u = 1300m/s

s = 7cm = 7/100m

v2 = u2 +2as

0 = 1300*1300 + 2*a*7/100

0 = 1690000 + 7a/50

-1690000 = 7a/50

-1690000*50 = 7a

-1690000*50/7 = a

a = 12071428.57 N

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