Question

d benches of a gallery in a cricket stadium r 1m wide & 1m high . a boy strikes d ball at a level of 1m above d ground & hits a sixer. d ball starts at 35m/s at an < of 530 with d horizontal . d benches r perpendicular to plane of motion & d first bench is 110m from d boy. ON WHICH BENCH WILL THE BALL HIT??

ANS 6TH

Joshi sir comment

 

we know that y = xtanθ - gx2/2u2cos2θ

according to the given conditions 

x  = 110+n

y = n                              here n is the number of bench in which ball strikes

θ, u and g are given 

 

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