JEE Main2007PhysicsMotion in Two DimensionsActual
A particle just clears a wall of height b at distance a and strikes the ground at a distance c from the point of projection. The angle of projection is
Options
- A⁻¹ b a c
- B45^
- C⁻¹ b c a(c-a)
- D⁻¹ b c a
Correct answer
C. ⁻¹ b c a(c-a)
Step-by-step solution
a=(u ) t and b=(u ) t- 1 2 g t^2b=a - 1 2 g a^2 u^2 ^2 also, c= u^2 2 g b=a - a^2 g 2 ( 2 c g ) ^2 =a - a^2 2 c 2 (a- a^2 c ) =b = b c a(c-a) .