doubt in Physics winter 10 papers !

[rainbowtiara24]

I need help with these questions ...
winter 10 paper 32 question 2 b ii)
and paper33 q 2 ) b i )


Thank you

 

[ajmanutd]

2 b ii)u hav 2 use d formula K=1/2MV^2
u calculated K in d earlier step and M is 0.15Kg.
u substitute d values in d formula and find V..
2 b i)since d direction is constantly changing u need a force 2 change it, that is why a force is required..

hope u gt it..