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7(i) A bike and a car have exactly same value of momentum. Whose kinetic energyis more, and why? |
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Answer» 𝑻𝒉𝒆 𝒃𝒊𝒌𝒆 𝒉𝒂𝒔 𝒎𝒐𝒓𝒆 𝒌𝒊𝒏𝒆𝒕𝒊𝒄 𝒆𝒏𝒆𝒓𝒈𝒚 𝒂𝒔 𝒊𝒕 𝒉𝒂𝒔 𝒍𝒆𝒔𝒔 𝒎𝒂𝒔𝒔. P² KE = ------ 2m So, we know the mass of the car is more than a bike so, as momentum is the same.And the above expression tells that kinetic energy is inversely proportional to mass.The bike has more kinetic energy as it has less mass. |
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