help wanted in PHySiCzzZ

[Rockzstar]

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Physics (0625)/0625_s10_qp_31.pdf

question number 8 a ii .... can anyone write the answer in sentence...... and the way in which we should write in orginal

 

[JimmyCarter]

physics is over!

 

[Rockzstar]

i neeed it