A bullet of mass 25g moving with speed of 200m/s is stopped within 5cm of the target. What is the average resistance offered by the target?
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u = 200 m/s
v = 0
s = 0.05m
a = (v^2 - u^2)/2s
a = -(200^2)/2×0.05
a = -40000/0.1
a = -400000 m/s^2
mass = 25g = 0.025kg
Force = ma = 0.025×400000 = 10000N
Average resistance is 10000N
v = 0
s = 0.05m
a = (v^2 - u^2)/2s
a = -(200^2)/2×0.05
a = -40000/0.1
a = -400000 m/s^2
mass = 25g = 0.025kg
Force = ma = 0.025×400000 = 10000N
Average resistance is 10000N
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