Hello, Faith,
Kinetic energy is given by the expression: Ek = (1/2)mv2 . In this question, we are given the energy in Joules and a mass of 34.51 kg. It is good to remember that 1 Joule = 1 kg*m2/s2,
Knowing this, we can rearrange the equation to solve for v, speed:
v2 = 2Ek/m
v2 = 2(83.41 kg*m2/s2)/(34.51kg)
v2 = 2(83.41 kg*m2/s2)/(34.51kg)
v2 = 2(83.41)/(34.51) m2/s2
v2 = 4.834 m2/s2
v = 2.20 m/s
Bob
