Question

two particles P and Q are projected in the same vertical plane from points hj and 2hi respectively withreset to the crisis of unit vectors i and i i being horizontal and j being verticalangles a and B to the direction of i respectively. If they collide show that the ratio of the initial speeds of A2 sin B+cosand B is2 sin a + cosa

Answer 1

Answer:

Explanation:god knows

Answer 2

First let us write their velocities in vector form, for a particle projected with some velocity v at an angle of θ to the horizontal, the velocity is given as :-

v⃗ =vcosθı^+(vsinθ−gt)ȷ^

⋆ The slope(m) will be :-

⟹m=vsinθ−gtvcosθ

⋆ Now the velocities will be parallel when their respective slopes will be equal. So :-

⟹usin30o−gtucos30o=usin60o−gtucos60o  

⟹gt(3–√−1)=u

⟹t=ug(3–√−1)