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Lolagoeslala
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Homework Statement
a 50 g bullet hits and becomes embedded in a wooden block of as 450 g which is at rest on a surface (μ = 0.41) and is attached to a spring bumper. The block and bullet compress the spring bumper a distance of 20 cm. Is the spring constant is 250 N/m
find initial speed of bullet? how much energy has been lost in the collision?
The Attempt at a Solution
a)
mbvb +mwvw=mtvc
(0.05 kg)vb=(0.5kg)(4.47m/s)
vb=44.7m/s
b)
ET2= 1/2(0.5 kg)(4.47 m/s)^2
ET2= 4.995 J
ET1= 1/2(0.05 kg)(44.7m/s)^2
ET1= 49.95 J
ET1-W=ET2
W= 44.957 J
How would i represent this in a percentage?