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What is the work to be done to increase the velocity of a car from 20km/h to 40km/h if the mass of the car is 2000 kg?
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You have a new challenge .
[tex]\huge \fbox \orange{❥Question}[/tex]
What is the work to be done to increase the velocity of a car from 20km/h to 40km/h if the mass of the car is 2000 kg?
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Try to Answer!
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Answer:
Here ur answer.
Given, intial velocity ,u- 20km/hr = 20×5/18=50/9 m/s
final velocity, v- 40 km/hr=40×5/18=100/9 m/s
mass, m= 2000kg
2 2
Workdone = 1×mv /2-1×mu /2
==>W=m(v2- u2) /2
=2000[100/9×100/9-50/9×50/9]/2
= 2000(10000/81 -2500/81) /2
=2000(7500/81) /2
=92,592.5J
What is the work to be done to increase the velocity of a car from 20km/h to 40km/h if the mass of the car is 2000 kg?