(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

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?

3. 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?

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# Homework Help: Finding the energy lost in a collision as the bullet collides to the block

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