what is the work to be done to increase the velocity of a car from 30 km h to 60 km h if the mass of the car is 1500 kg ?
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tnwramit1:
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Work done is equal yo change in kinetic energy....(Work Energy Theorem).
W = 1/2 * m * (v^2-u^2)
Here m = 1500kg , u = 30km/h
= 30*1000/60*60 m/s
= 25/3 m/s and v = 60km/h
= 60* 1000/60*60 m/s
= 50/3 m/s.
=) W = 1/2 * 1500 kg * [(50/3)^2-(25/3)^2]
=) W = 750 * (2500/9 - 625/9)
=) W = 750* 208.333 J
=) W = 156250 J.
Hope it's helpful to u.
W = 1/2 * m * (v^2-u^2)
Here m = 1500kg , u = 30km/h
= 30*1000/60*60 m/s
= 25/3 m/s and v = 60km/h
= 60* 1000/60*60 m/s
= 50/3 m/s.
=) W = 1/2 * 1500 kg * [(50/3)^2-(25/3)^2]
=) W = 750 * (2500/9 - 625/9)
=) W = 750* 208.333 J
=) W = 156250 J.
Hope it's helpful to u.
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