Question

please answer these question in the attachment
1 and 2 question

Answer 1

Answer 1
  The velocity will be given by root v1v2

thus the answer for the first question is (a) root v1 v2

Answer 2


Change in Vertical momentum can be given by

                                          =   mu Cos 45 - mv
  Since    v=0


 thus                              =   mu Cos 45
                                     =  mu/root2

Thus answer is (c)