AP EAMCET Engineering 18 Sep 2020 Shift 1 Paper

The given situation is shown in the following figure.According to question, angle between two radius vector is 90∘.
i.e., θ+θ=90∘⇒θ=45∘
∴ Time taken by the two radius vectors connecting of explosion to fragments is t second, then
According to conservation of linear momentum,
Since, v1 and v2 are perpendicular to each other, hence
v1⋅v2=0
(−10

∧

i

−g

∧

j

)⋅10

∧

i

−g

∧

j

=0
⇒‌‌−100+g2t2=0
⇒‌‌x2=‌

100

g2

=‌

100

102

=1s