what work is said to be done to increase the velocity of a car from 15km/h to 30km/h, if the mass of car is 1000kg
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Answered by
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Answer:
m = 1000 kg
u = 15 km/h = 50/12 m/s
v = 30 km/h = 100/12 m/s
Work done = change in K.E.
K.E. = 1/2 mv² = 1/2 * 1000 * 50/12 * 50/12 = 8680.5 J
K.E. = 1/2 mv² = 1/2 * 1000 * 100/12 * 100/12 = 34722.2 J
34722.2 - 8680.5 = 26041.7 J
Hence work done = 26041.7 J
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Answered by
0
Answer:
m = 1000 kg
u = 15 km/h = 50/12 m/s
v = 30 km/h = 100/12 m/s
Work done = change in K.E.
K.E. = 1/2 mv² = 1/2 * 1000 * 50/12 * 50/12 = 8680.5 J
K.E. = 1/2 mv² = 1/2 * 1000 * 100/12 * 100/12 = 34722.2 J
34722.2 - 8680.5 = 26041.7 J
Hence work done = 26041.7 J
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