NEET-XII-Physics
P1 year:2019
- #30When an object is shot from the bottom of a
long smooth inclined plane kept at an angle 60°
with horizontal, it can travel a distance ``x_1``
along the plane. But when the inclination is
decreased to 30° and the same object is shot
with the same velocity, it can travel ``x_2``
distance. Then ``x_1 : x_2`` will be:
(1) 1 : ``\sqrt2``
(2) ``\sqrt2`` : 1
(3) 1 : ``\sqrt3``
(4) 1 : 2``\sqrt3``digAnsr: 3Ans : ( 3 )
Sol.
60°
g sin60°
30°
g sin30°
u
u
(Stopping distance) =
2
1
u
x
2gsin60
(Stopping distance) =
2
2
u
x
2gsin30
&implies;
= = =
1
2
x sin30 1 2
1: 3
x sin60 2 3