Which of the energy bar graphs and corresponding energy pie charts shows the energy present at the position circled in the picture?

answer; i believe that the correct answer is (d) a very small amount of mass

u=13

v=30

s/t=u+1\2at

=13+431/2

=13+265.5

=278.5

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s

do you have a formula possibly