what is the work be done to increase the velocity of a car 72km/hr to 108 km/hr if the mass of the 1500 kg
Answers
Answered by
2
Answer:
Given,
Mass = 1500kg
Initial velocity (u) = 72km/hr = 20m/sec
Final velocity (v) = 108km/hr = 30m/sec
To find:-
Work done
By applying K.E = 1/2mu^2
= 1/2×1500×400
= 300000J.
By applying K.E = 1/2mv^2
= 1/2×1500×900
= 675000J.
Gain in K.E = 1/2mv^2 - 1/2mu^2
= 675000 - 300000
= 375000J.
work done by the car is 375000J.
Similar questions