what is the work neede to be done to increase the velocity of a car from 30 kmh-¹to 60 kmh-¹if the mass of the car is 1500 kg.
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Answers
Answered by
2
Explanation:
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
Answered by
0
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