The velocity of a car increase from
54 km/hr to 72 km/hr. How much is
the work done if the mass of the car
is 1500 kg ?
Answers
Answered by
14
Answer:
131.25 kJ
Explanation:
54 kmph = 54 × 5/18 m/s = 15 m/s
72 kmph = 72 × 5/18 m/s = 20 m/s
Work = Change in Kinetic energy
= 0.5m(v² - u²)
= 0.5 × 1500 kg × [(20 m/s)² - (15 m/s)²]
= 131,250 J
= 131.25 kJ
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