On an inclined plane of inclination 30°, a ball is thrown at an angle of 60° with the horizontal from the foot of the incline with a velocity of 10√3 ms-1. Then the ball will hit the inclined plane in

Question

On an inclined plane of inclination 30°, a ball is thrown at an angle of 60° with the horizontal from the foot of the incline with a velocity of 10√3 ms-1. Then the ball will hit the inclined plane in (A) 1 s (B) 2 s (C) 2√3 s (D) 4√3 s

Tardigrade Admin · Accepted Answer

T=(2 × 10√3 sin (60°-30°)/10 cos 30°)s =4 sin 300 =2 s

Q. On an inclined plane of inclination $3 0^{\circ}$ , a ball is thrown at an angle of $6 0^{\circ}$ with the horizontal from the foot of the incline with a velocity of $103 m s^{- 1}$ . Then the ball will hit the inclined plane in

$1 s$

$2 s$

$23 s$

$43 s$

$T = \frac{2 \times 10 3 s in ( 6 0 ^{\circ} - 3 0 ^{\circ} )}{10 cos 3 0 ^{\circ}} s$

$= 4 s in 3 0^{0} = 2 s$

Q. On an inclined plane of inclination 30∘, a ball is thrown at an angle of 60∘ with the horizontal from the foot of the incline with a velocity of 103​ms−1. Then the ball will hit the inclined plane in

1s

2s

23​s

43​s