What is the work to be done to increase the velocity of a car from 30 km/hr to 60km/hr if the mass of the car is 1500kg?
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Answered by
3
W = 1/2 m (v sq. - u sq.)
. . = 1/2 * 1500 * 90 * 30
. . = 2025000 joule
. . = 1/2 * 1500 * 90 * 30
. . = 2025000 joule
anurag0804rathore:
guys actually kmph will be changed to m per sec than solve by same method
or change joule by kg kmph
Answered by
3
Given mass = 1500kg.
Given u = 30km/hr
= 30 * (5/18)
= 25/3
Given v = 60km/hr
= 60 * (5/18)
= 50/3
We know that Work done = 1/2 * m(v^2 - u^2)
= 0.5 * 1500 * (2500/9 - 625/9)
= 0.5 * 1500 * 208.333
= 156250 J
= 156.25KJ.
Given u = 30km/hr
= 30 * (5/18)
= 25/3
Given v = 60km/hr
= 60 * (5/18)
= 50/3
We know that Work done = 1/2 * m(v^2 - u^2)
= 0.5 * 1500 * (2500/9 - 625/9)
= 0.5 * 1500 * 208.333
= 156250 J
= 156.25KJ.
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