Question

find the change in kinetic energy of vehicle of mass 200kg . when it's speed increase from 30ms-¹ to 20ms-¹​

Answer 1

Answer:

Explanation:

k.e =1/2mv^2

initial kinetic energy

1/2*200*(30)^2

1*100*900

90000 joules

Final kinetic energy

1/2*200*(20)^2

1/2*200*400

100*400

40000 Joules

change = final-inital

40000-90000

=-50000 J

hope it helps you