Hard
Question
From a motorboat moving downstream with a velocity 2 m/s respectest to river, a stone is thrown. The ston falls on an ordinary boat at the instant when the motorboat collides with the velocity of the ordinary boat respect to river is zero. The river flow velocity is given to be is given to be 1 m/s The initial velocity vector of the stone with respect to earth is : -
Take the value of g = 10 m/s2
Initial separation between the two boats is 20 m.
Take the value of g = 10 m/s2
Initial separation between the two boats is 20 m.
Options
A.2i + 20j
B.3i + 40 j
C.3i + 50j
D.2i + 50j
Solution
Time of collision of two boat = 20/2 = 10 sec. As given in question i.e. the time of flight of stone is also equal to 10 sec. so vertical component of stone initially is 50 m/s and the horizontal component w.r.t motorboat equals to 2 m/s.
Hence
= 3î + 50ĵ
Hence
= 3î + 50ĵ Create a free account to view solution
View Solution FreeMore Physics Questions
A body is projected at such angle that the horizontal range is three times the greatest height. The angle of projection ...A ball is horizontally projected with a speed v from the top of a plane inclined at an angle 45o with the horizontal. Ho...Three stones A, B, C are projected from surface of very long inclined plane with equal speeds and different angles of pr...At the same instant, two boys throw balls A and B from the window with speeds υ0 and kυ0 respectively, where...A projectile is given an initial velocity of m/s, where is along the ground and is along the vertical. If g = 10 m/s2, t...