1.

What is the work needed to be done to increase the velocity of car from 30km / h to 60km / h if the mass of car 1500

Answer»

Work = CHANGE in KINETIC ENERGY

= 0.5 m (v² - u²)

= 0.5 × 1500 kg × [(60 × 5/18 m/s)² - (30 × 5/18 m/s)²]

= 156250 joules

= 156.25 kJ


Work done is 156.25 kJ




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