Calculate the work required to be done to stop a car of 1500kg moving at a velocity of 60km/h

Calculate the work required to be done to stop a car of 1500kg moving

1.	Calculate the work required to be done to stop a car of 1500kg moving at a velocity of 60km/h
Answer» Mass of car= 1500kgVelocity=60 km/h =60^5/18 =16.67m/sKE=1/2×mv² =1/2×1500×16.67×16.67 = 208416 j =208.4 kjSo the work need to stop the car is 208.4 kj . Mass of car, m = 1500 kgvelocity, v = 60 km/h = {tex}60 \\times \\frac{5}{18}=16.67\\ ms^{-1}{/tex}Kinetic energy possessed by the car = {tex}\\frac{1}{2} mv²{/tex}⇒ KE = {tex}\\frac{1}{2} \\times 1500 \\times 16.67^2=208416.7\\ J=208.4\\ kJ{/tex}To stop the car, we have to make the KE of car 0. So the work need to be done is 204.4 kJ.\xa0