A foot - ball player hits tha ball with speed 20ms^(-1)with angle 30^(@)with respect to horizontal direction as shown in the figure. The goal post is at distance of 40 m from him. Find out whether ball reaches the goal post

A foot - ball player hits tha ball with speed 20ms^(-1)with angle 30^(

1.	A foot - ball player hits tha ball with speed 20ms^(-1)with angle 30^(@)with respect to horizontal direction as shown in the figure. The goal post is at distance of 40 m from him. Find out whether ball reaches the goal post
Answer» Solution :Given: `u = 20 m//s` `theta = 30^(@)` Formula :`R = (u^(2) SIN 2 theta)//g` `R = ((20)^(2)sin 2 (30))/(9 . 8)` `= (400xx sqrt(3))/(2 xx 9 . 8)= (400 xx 1.732)/(19.6)` R = 35 . 34 m In the problem it is given that R = 40 m and the found value less than 40 m . Therefore BALL cannot reach the GOAL post .