What is the kinetic energy of a 55-kilogram skier traveling at 9.0 meters per second?
(1)2.5 × 102j
(2)5.0 × 102j
(3)2.2 × 103j
(4)4.9 × 103j

The formula to get the Kinetic Energy is KE=1/2mv^2 where m=mass in kilogram and v=velocity of the object. From you given, we substitute it to the variables. This is the solution: KE=1/2mv^2 KE=1/2(55kg)(9.0m/s)^2 KE=1/2(4455) KE=2227.5J or it can be written in scientific notation as 2.2275x10^3J or closest to your choices is 2.2x10^3J.

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