What is the work done to be done to increase the velocity of the car from 30km/h to 60km/hif the mass of car is 1500 kg
Answers
Answer:
Hey mate!!
GIVEN;
MASS=1500KG
V=60KM/HR×5/18= 50/3 m/sec
U=30km/h×5/18= 50/6 m/sec
Explanation:
So,
W.D=Change in kinetic energy
= Final k.e - Initial k.e
= 1/2 ×1500 ×50/3×50/3 - 1/2×1500×50/6×50/6
= (250×625)Joule
= 156250J
Therefore, the work di e is 156250 J
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Answer:
Work done is 156250 J.
Explanation:
Given,
The mass (m) of the car is 1500 kg.
Initial velocity of car = u = 30 km / hr = 30 * 5/18 = 25 / 3 m/s
Final velocity of car = v = 60 km / hr = 60 * 5/18 = 50/3 m/s
To find: The work to be done to increase the velocity of a car from
30 km h-1 to 60 km h^-1
Solution:
Initial kinetic energy = Ki = 1/2mu² = 1/2*1500*25/3 * 25/3 = 156250/3 J
Final Kinetic energy = Kf = 1/2mv² = 1/2*1500*50/3*50/3 = 625000/3 J
Work done can be given as change in Kinetic Energy,
i.e W = ΔK.E
or, W = Kf - Ki
or, W = 625000/3 - 156250/3
or, W = 156250 J
Therefore, Work done is 156250 J.