Solve 15 change tn Its velocity In 15 second is
The velocity of a boat with rescrcted to grourui is 3i 4)
of water with respected to ground is —31 — 4 _ Hexe tix
w.r.t. water is — The quantities are in Sl.
When angle Of is tir range Of tyr is R. NOW if
its range will remain sane. (ie R)
the angle of projection is „
If the magnitude of the vector products of two vectevs I A X B I is
times the magnitude of their scalar product A • B then tix Mgk t*tween
of a ßojectile, at its maxinwm trigM is
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