Question

of
I. An inclined
plane is made at an
angle of inclination of 30 degrees. A ball is thrown from the base of incline making an angle such that it strikes the incline perpendicularly. Find the angle of projection?​

Answer 1

Answer:

projection angle will be 30 degree

Answer 2

Answer:

Explanation:

Formula for time of flight on an inclined plane is :-

T = 2u Sin α /g Cos(theta)

Here ,

α= 60-30=30° ,which is angle of projection from inclined plane.

theta = 30°, which is angle of inclination (of the inclined plane)

∴ T= 2 x 10√3 x 1/2 / 10 x √3/2 (Sin 30°= 1/2 30°=√3/2)

T= √3 / √3/2

= √3 x 2/√3

= 2 seconds