Question

what is the work to be done to increase the velocity from 18km/hr to 19km/hr if the of car is 2000kg
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Answer 1

Answer:

The net work done on the car equals the change in its kinetic energy. V1=18 km/h=5 m/s. V2=19 km/h=5.28 m/s. W=m*(V2^2-V1^2)/2=2000*(5.28^2–5^2)/2=2.85 kJ

Answer 2

Answer:

1000 jule

Explanation:

work done = change in kinetic energy

work done is

$\frac{1}{2} \times 2000 \times {(19 - 18)}^{2}$

$\frac{1}{2} \times 2000 \times 1$

$1000$

sorry, misunderstanding

first change velocity in m/ s then solve