KinematicsHard
Question
A particle is projected from a point (0, 1) on Y-axis (assume + Y direction vertically upwards) aiming towards a point (4, 9). It fell on ground along x axis in 1 sec.
Options
A.(3, 0)
B.(3, 0)
C.(2, 0)
D.(2√5, 0)
Solution
tanθ = 
= 2 ,
y = uyt +
ayt2
now − 1 = usinθ (1) −
g (1)2
usinθ = 4 and sin θ =
⇒ u = 2√5
now x = u cos θ (1) = ×
= 2m
= 2 , y = uyt +
ayt2now − 1 = usinθ (1) −
g (1)2usinθ = 4 and sin θ =
⇒ u = 2√5now x = u cos θ (1) = ×
= 2mCreate a free account to view solution
View Solution FreeMore Kinematics Questions
At the same instant, two boys throw balls A and B from the window with speeds υ0 and kυ0 respectively, where...A sniper fires a rifle bullet into a gasoline tank making a hole 50 m below the surface of gasoline. The tank was sealed...The time dependence of a physical quantity P is given by P = P0 exp (−α t2), where a is a constant and t is t...Drops of water fall from the roof a building 9 m. high at regular intervals of time, the first drop reaching the ground ...A ball is projected upwards from the foot of the tower. The ball crosses the top of the tower twice after an interval of...