KinematicsMedium
Question
A particle at a height ′h′ from the ground is projected with an angle 30o from the horizontal, it strikes the ground making angle 45o with horizontal. It is again projected from the same point at height h with the same speed but with an angle of 60o with horizontal. Find the angle it makes with the horizontal when it strikes the ground :
Options
A.tan-1 (4)
B.tan-1 (5)
C.tan-1 (√5)
D.tan-1 (√3)
Solution
using v = 
v =
(vertical comp. when striking)
Now tan 45o = 1
u cosθ =
u2 cos2 θ = u2 sin2 θ + 2gh .........(1)
u2
= 2gh
u2 = 4gh
u = 2
tan θ =
v =
(vertical comp. when striking)Now tan 45o = 1
u cosθ =
u2 cos2 θ = u2 sin2 θ + 2gh .........(1)
u2
= 2ghu2 = 4gh
u = 2
tan θ =
Create a free account to view solution
View Solution FreeMore Kinematics Questions
An object with a mass 10 kg moves at a constant velocity of 10 m/sec. A constant force then acts for 4 seconds on the ob...Let $\overrightarrow{v}$ (t) be the velocity of a particle at time t. Then :...A particle is projected vertically upwards from a point A on the ground. It takes t1 time to reach a point B but it stil...A ball is projected from a certain point on the surface of a planet at a certain angle with the horizontal surface. The ...A particle is thrown with a speed u at an angle θ with the ground. When the particle makes φ angle with the gr...