What is the work done to increase the velocity of a car from 30km/h to 60km/h if the mass of the car is 1500kg?

Work done to increase the velocity of a car = Change in kinetic energy

m =  1500kg

u = 30km/h = 30*(5/18) m/s= 25/3 m/s

v = 60km/h = 60*(5/18) m/s = 50/3 m/s

Plug-in these values in above equations, we get

W = (0.5)(1500)(625/9)(4-1) = 156250 J = 156.25 KJ

  • 44

K.E.=1/2mv(raised to power 2)

=1/2*1500*900

=675000J

675KJ

  • -38

work done to change velocity = change in kinetic energy

change in kinetic energy = 1/2 m (v2 - u2)

m = 1500kg

v = 60km/hr

u = 30km/hr 

change in kinetic energy = 1/2 x 1500 x (602 - 302)

= 1/2 x 1500 x (3600 - 900)

= 1/2 x 1500 x 2700

= 2025000J

hope this helps!!!!!!!!

  • -36
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