1.

Equation of trajectory of a projectile is given by y =-x" + 10x where x and y are in meters and xalong horizontal and y is vertically upward and particle is projected from origin. Then which of thefollowing option is correct: (g 10 m/s)(A)initial velocity of particle is 5 m/s (B) horizontal range is 10 m(C) maximum height is 30 m(D) angle of projection with horizontal is tan (5)

Answer»

Comparing y = 10x-x² = 10x(1-x/10)

with the standard equation of trajectory y = xtan∅(1-x/R) , we get than

tan∅ = 10 and R = 10m

so, option B should be correct.



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