Calculate the mass of the ice that requires 240000j to change its state to water

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

talk back to him about the sport and show him your expertise or leave the room

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach