Question

What is the work to be done to increase the velocity from 18 km/hr to 36 km/hr if the

mass of the car is 2000 kg?​

Answer 1

Answer:

What is the work to be done to increase the velocity of a car from 30 km h

−1

to 60 km h

−1

If the mass of the car is 1500 kg?

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Initial velocity u=30 km/h=30×

18

5

=

3

25

m/s

Final velocity v=60 km/h=60×

18

5

=

3

50

m/s

Mass m=1500 kg

Work done W=

2

1

mv

2

−

2

1

mu

2

⟹ W=

2

m

(v

2

−u

2

)=

2

1500

×((

3

50

)

2

−(

3

25

)

2

)=156187 J