what is work done to increase velocity of car from 36 km/hr to 72 km/hr if mass of car is 1500 kg?
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Formula :
Work done = increase in kinetic energy
= 1/2 m v² - 1/2 m u²
= 1/2 m ( v² - u² )
Given :
mass = 1500 kg
v = 72 km/hr
u = 36 km/hr
Work = 1/2 m ( v² - u² )
= 1/2 × 1500 × ( 72² - 36² )
= 750 × ( 72 + 36 )( 72 - 36 )
= 750 × 108 × 36
= 750 × 3888
= 2916000
= 2.916 × 10⁶
ANSWER:
The work done is 2.916 × 10⁶
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