Hard
Question
A ball is thrown upward at an angle of 30o with the horizontal and lands on the top edge of a building that is 20 m away. The top edge is 5m above the throwing point. The initial speed of the ball in metre/second is (take g = 10 m/s2) :
Options
A.u = 40
m/s
m/sB.u = 40
m/s
m/sC.u = 40
m/s
m/sD.u = 40
m/s
m/sSolution
y = x tanθ −
g 
5 = 20 tan 30o −
⇒ u2 =
Create a free account to view solution
View Solution FreeMore Physics Questions
From a motorboat moving downstream with a velocity 2 m/s respectest to river, a stone is thrown. The ston falls on an or...The horizontal range and the maximum height of a projectile are equal. The angle of projection of the projectile is...A river is flowing from west to east at a speed of 5 m/min. A man on the south bank of the river, capable of swimming at...A projectile can have the same range R for two angles of projection. If T1 and T2 be the time of flights in the two case...A bomber plane moving at a horizontal speed of 20 m/s releases a bomb at a height of 80 m above ground as shown. At the ...