Kinetic energy is the energy from rest; initial velocity =0 potential energy is the energy in motion.nd potential energy is the energy stored nd kinectic energy is the to be used up by a body

I am the best in maths :-see the solution
1/m+1/n=4/7
n+m/mn=4/7
n+m/mn=4/7
then cross multiply.
7n+7m=4mn
7(n+m)/4mn.final ans

This are the numbers
0.41,0.42,0.43.0.44,0.45,0.46,0.47,0.48,0.49