Minimum speed of lead bullet needed for it to melt?

If a lead bullet goes fast enough, it can melt completely when it comes to a halt suddenly, and all it's kinetic energy is converted into heat via friction. Find the minimum speed of a lead bullet (initial temp. = 30.0 C) needed for this to happen.

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  • Steve
    Lv 7
    1 decade ago
    Favorite Answer

    ½mv² = mK(T-30) where K is the specific heat of lead and T is the melting temperature in °C

    Solve this eq for v

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