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astic of lenght 5m lies at rest in x-y plane at angle r1 with thex axis
a) what the oritation of the stick to an observer moving at relative Bc(hint find r2

طبعا هنا r1 , r2 هى عبارة عن ثيثا1 وثيثا2

b)if r2 larger than r1 by 8.13 degree then find the velocity of the observer and r1




السؤال الثانى:
the relativistic velocity of an object is v ,if the relativistic velocity is doubled then the total energy is doubled and the kinatic energy is increased three times
find:
a)relatividtic velocity v
b)the momentum p at the first case