1.

An arrow is shot into air. Its range is 200m and its time of flight is 5s. If `g = 10 ms^(-2)`. If `g = 10ms^(-2)`, then horizontal component of velocity and the maximum height will be respectivelyA. `20 ms^(-1), 62.50 m`B. `40 ms^(-1), 31.25m`C. `80 ms^(-1), 62.5m`D. None of these

Answer» Correct Answer - B
Time of flight, `T = (2u_(y))/(g)`
`:. u_(y) = (gT)/(2) = 25 ms^(-1)`
Now, `H = (u_(y)^(2))/(2g) = ((25)^(2))/(50) = 31. 25m`
Further, `R = u_(x) T`
`:. u_(x) = (R)/(T) = 40 ms^(-1)`


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