The mass of an object with 500 j of kinetic energy moving with a velocity of 5 m/s is . (report the answer to one significant figure.)

Kinetic energy is the energy that is associated with motion. It is the energy possessed by an object that is moving. It is calculated from one-half the product of the mass and the square of the velocity of the object. From this, we can calculate the mass of the object. We do as follows:

KE = mv^2/2
500 J = m(5 m/s)^2 / 2
m = 40 kg

Ibelieve your answer is b.hope this : )