Question

Calculate the kinetic energy of a car of mass 500kg moving with a velocity of 18Km/h. Find the new kinetic energy if two passengers of mass 50 kg each sit in the car?​

Answer 1

Answer:

so

k=1/2mv^2

=1/2×500×18×18

=81,000 J

k= 1/2×(500+50+50)×18

=1/2×600×18×18

=97,200J