Two particles having position vectors \bo {r}_1=(3 \stackrel{\^}{\bo {i}}+5 \stackrel{\^}{\bo {j}}) metres and \bo {r}_2=(-5 \stackrel{\^}{\bo {i}}-3 \stackrel{\^}{\bo {j}}) metres are moving with velocities \bo {v}_1=(4 \stackrel{\^}{\bo {i}}+3 \stackrel{\^}{\bo {j}}) {\m} \/ { s} and \bo {v}_2=(a \stackrel{\^}{\bo {i}}+7 \stackrel{\^}{\bo {j}}) {\m} \/ { s}. If they collide after 2 { s}, then the value of a is :

EAMCET Engineering 2003 Solved Paper

Section: Physics

Question : 32 of 160

Marks: +1, -0

Two particles having position vectors r1=(3

) metres and r2=(−5

−3

) metres are moving with velocities v1=(4

)m∕ s and v2=(a

)m∕ s. If they collide after 2 s, then the value of a is :

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