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Problem
Problem
A particle is projected from ground with velocity
20
2
m/s
20\sqrt{2} \text{ m/s}
20
2
m/s
at
45
∘
45^\circ
4
5
∘
. At what time particle is at height 15 m from ground? (
g
=
10
m/s
2
g = 10 \text{ m/s}^2
g
=
10
m/s
2
)
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