Two cars, a and b, are traveling with the same speed of 40. 0 m/s, each having started from rest. Car a has a mass of 1200 kg, and car b has a mass of 2000 kg. Compared to the work required to bring car

Lijinma asked Dec 6, 2022

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Lijinma asked Dec 6, 2022

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20 votes

W=K_B-K_A
W=m_B v^2/2-m_A v^2/2=(m_B-m_A)v^2/2
W=(2000-1200) 〖40〗^2/2=640000 J=640 kJ.

Pbies answered Dec 10, 2022

by Pbies

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